| Subject | Date Asked |
|
| equations | 10/6/2009 |
Q: find the solution given the following: y-6z=-2x x-y+z=-10 x+y-z=0 ANSWER: y - 6z = -2x x - y + z = ...
A: 2x + y = (1/2)z 2y = -2(x + z) 3x - y + z = 16 2y = -2(x + z) y = -(x + z) y = -x - z 2x - x - z = ...
|
| ap calculus preparation | 10/4/2009 |
Q: my problems (set 2): 2. Let g(x)= radical(x). Find: (a) g(5s+2) (b) g(radical(x)+2) (c) 3g(5x) (d) ...
A: my problems (set 2): 2. Let g(x)= radical(x). Find: (a) g(5s+2) = sqrt(5s + 2) (b) g(radical(x)+2) ...
|
| maths | 9/25/2009 |
Q: what is the answer to these simultaneous equations? 2x+y=8 5x+3y=12? 2x+3y=12 5x+y=14? 2x+2y=3 ...
A: 2x + y = 8 5x + 3y = 12 y = -2x + 8 5x + 3(-2x + 8) = 12 5x - 6x + 24 = 12 -x = -12 x = 12 y = ...
|
| solving linear systems three variables | 9/23/2009 |
Q: 2x-y-z=11 x+y-4z=-1 -x+3y+z=-10
A: 2x - y - z = 11 x + y - 4z = -1 -x + 3y + z = -10 x + y - 4z = -1 -x + 3y + z = -10 4y - 3z = -11 ...
|
| Pre-calculas | 9/23/2009 |
Q: Two pumps of different sizes, working together, can empty a fuel tank in 5 hours. The larger pump ...
A: (1/x) + (1/y) = (1/5) (1/(y - 4)) + (1/y) = (1/5) 5y + 5(y - 4) = y(y - 4) 5y + 5y - 20 = y^2 - 4y ...
|
| ap calculus preparation | 9/22/2009 |
Q: 17. For question 17, find the slope-intercept form of the line satisfying the given conditions. The ...
A: (2,8) and (-4,6) m = (6 - 8)/(-4 - 2) m = (-2)/(-6) m = (1/3) M = ((-4 + 2)/2),((6 + 8)/2) M = ...
|
| ap calculus preparation | 9/22/2009 |
Q: My problems (set 1): 5. Find the slope and y-intercept of: (e) (x/a)+(y/b)=1 17. The line is the ...
A: 5.) e.) (x/a) + (y/b) = 1 xb + ay = ab ay = -xb + ab y = (-b/a)x + b slope is (-b/a) y-intercept is ...
|
| Graphing an Equation | 9/21/2009 |
Q: I need help with the STEPS (preferrably very detailed steps) on graphing the following equation (and ...
A: x^2 + 20 - y^2 - 7x - 2y + 21 - 8x + 6y - 2 = 2 - 4y - 5x - 2y^2 x^2 - 15x - y^2 + 4y + 39 = 2 - 4y ...
|
| nth | 9/17/2009 |
Q: My son has h/w re n'ths. He gets the straight f/w ones but has one where the pattern is 2,4,8,16, ...
A: the geometric formula is a(n) = a1 * r^(n - 1) a(2) = 2 * r^(2 - 1) 4 = 2r r = 2 a(3) = 2 * 2^(3 ...
|
| pre-calculus | 9/6/2009 |
Q: How would i find the sum of the square roots of the two numbers if thier arithmetic mean is 12 and ...
A: AM = (sqrt(x) + sqrt(y))/2 sqrt(x) + sqrt(y) = 24 GM = (sqrt(x)sqrt(y))^(1/2) 64 = sqrt(xy) xy = ...
|
| inverse trig | 9/2/2009 |
Q: sin( arcos(-3/5))
A: sin(arccos(-3/5)) arccos(-3/5) is the same as saying cos(A) = -3/5 (-3)^2 + y^2 = 5^2 9 + y^2 = ...
|
| Pre Calculus | 9/2/2009 |
Q: Solve for the indicated variable (listed after the semicolon). Restrict all answers to the interval ...
A: 4sin(x)cos(x) = 1 2(2sin(x)cos(x)) = 1 2(sin(2x)) = 1 sin(2x) = (1/2) 2x = 30 or 150 x = 15 or 75 : ...
|
| Precalculus | 9/1/2009 |
Q: Suppose a = cos(20). Find the following in terms of a: 1) cos(160) 2) sin (200) Would I have to use ...
A: 1.) cos(160) = cos(180 - 20) = cos(180)cos(20) + sin(180)sin(20) = -cos(20) so cos(160) = -cos(20) ...
|
| diameter question | 8/31/2009 |
Q: Can you help me with this question? If you rolled up an 8 1/2 by 11" sheet of paper into the ...
A: if its 8.5 high that only leaves 11 C = pi d 11 = pi * d d = 11/pi d = about 3.5 inches in ...
|
| subsitution or elimination | 8/27/2009 |
Q: Please help me! 1. -x+6y=11 x-2y=1 2. x+3y=6 2x+y=-8 Thanks!
A: 1.) -x + 6y = 11 x - 2y = 1 the x's cancel out 4y = 12 y = 3 x - 2(3) = 1 x = 7 ANS : (7,3) ...
|
| limit | 8/25/2009 |
Q: 1 -why we say x/0=not limited although 0 is a number . 2- 0!=1 , why ?
A: x/0 is not limited because it can't be measured. you can divide nothing by any number and get ...
|
| function tables | 8/21/2009 |
Q: i've been busting my brain trying to find out the equation rule to these to functions. 1) x(weeks) ...
A: if you are saying you have the values 1,3 2,15 3,75 4,375 then its like saying 3,15,75,375 of a ...
|
| graphing | 8/14/2009 |
Q: How do I graph 2x + 3y = 24
A: 2x + 3y = 24 3y = -2x + 24 y = (-2/3)x + 8 go to http://www.calculator.com/calcs/GCalc.html type ...
|
| trigonometry | 8/14/2009 |
Q: sum and subtraction of identities * sin (A+B)=sinA cosB+ cosA sinB * sin (A-B)=sinAcosB-cosAsinB ...
A: if you are wanting me to answer the last 4 then i'm assuming you mean sec(A - B) = 1/(cos(A)cos(B) ...
|
| college algebra (verbal problems) | 8/13/2009 |
Q: our teacher is out on some seminar in which he is the speaker. he left us this project and i somehow ...
A: 1.) Check with answers.yahoo.com on this one, because i get .07x = -51 so something isn't right or ...
|
| Math Logarithim | 8/11/2009 |
Q: I'm working with a formula that reads B=max(1/2ln(d),1) d = 3.47 It been so long since I've ...
A: is that suppose to be coordinates B = max((1/2)ln(d),1) you have a comma. anyway, just access ...
|
| Finite Mathematics | 8/6/2009 |
Q: 1.Calculate the present value of an investment if its future value is $10,000 and it is invested for ...
A: you can use the formula I = P(1 + (r/n))^(n * t) then just use inverse of operations. 1.) 10000 = ...
|
| Finite Mathematics | 8/5/2009 |
Q: Calculate the future value of the annuity due. Round answer to the nearest cent. 1. 4,580 Quarterly ...
A: I = P(1 + (r/n))^nt 1.) I = 4580(1 + (.16/4))^16 I = $8578.25 ------------------------------ 2.) ...
|
| Equations using Matrices | 7/29/2009 |
Q: Solve the system of equations using matrices. 2x+y+z = 5 4x-y-3z= 1 8x+y-z = 5 My main problem is ...
A: 2x + y + z = 5 4x - y - 3z = 1 8x + y - z = 5 2x + y + z = 5 8x + y - z = 5 2x + y = 5 y = -2x + 5 ...
|
| Functions | 7/25/2009 |
Q: HELP! I have no idea how to do these. Can you walk me thru this please?? 1. let f(x) - 2x^2+3 and ...
A: oh ok f(x) = 1/(x + 2) (f(a + h) - f(a))/h h ≠ 0, thats the symbol you could had used. ...
|
| trigonometry | 7/20/2009 |
Q: Verify that the equation is an identity sin(4x)=(4 sin x cos x)(2 cos^2 x-1)
A: sin(4x) = (4sin(x)cos(x))(2cos(x)^2 - 1) (4sin(x)cos(x))(2cos(x)^2 - 1) 2sin(2x)cos(2x) = ...
|
| trigonometry | 7/16/2009 |
Q: prove the following trigonometric identities: sinb/1+cosb + 1+cosb/sinb = 2cscb
A: if by this you mean (sin(b)/(1 + cos(b))) + ((1 + cos(b))/sin(b)) = 2csc(b) (sin(b)^2 + (1 + ...
|
| Maths Problem | 7/10/2009 |
Q: My question is: A positive integer n is such that numbers 2n+1 and 3n+1 are perfect squares. Prove ...
A: 2n + 1 = x^2 3n + 1 = y^2 2(8) + 1 = 17 2(16) + 1 = 33 2(24) + 1 = 49 2(32) + 1 = 65 2(40) + 1 = 81 ...
|
| caluculus | 7/9/2009 |
Q: Sn = (a1 + an) or Sn = [2a1 + (n – 1)d] 1. Find the sum of the first twelve terms of ...
A: 1.) a(n) = 15 + 7(n - 1) a(12) = 15 + 7(12 - 1) = S(12) = (12/2)(15 + 92) = 642 ...
|
| calculus | 7/9/2009 |
Q: Geometric Sequences 1.Find the tenth term in the sequence ¼ , ½ , 1, 2, …… 2.Which term in the ...
A: 1.) (1/4), (1/2), 1, 2, .... a(n) = (1/4) * r^(n - 1) a(2) = (1/4) * r^1 (1/2) = (1/4)r r = 2 ...
|
| System of linear equations | 7/8/2009 |
Q: How to solve the system : x1+x2=a1 x1+x3=a2 x2+x4=a3 x3+x4=a4 a1, a2, a3, a4 are constants.
A: x1 + x2 = a1 x1 + x3 = a2 x2 + x4 = a3 x3 + x4 = a4 x1 + x2 = a1 x1 = -x2 + a1 -x2 + a1 + x3 = a2 ...
|
| Algebra: Graphing | 7/7/2009 |
Q: Explain how you would find the coordinates of a point 7/8 of the way from point A to point B.
A: If AB is (x1,y1) and (x2,y2), then AB = sqrt((x2 - x1)^2 + (y2 - y1)^2) now you say either 7/8 of ...
|
| equation | 7/3/2009 |
Q: 1)A student responded to all the 22 questions on a test and received a score of 63.5.If the scores ...
A: x + y = 22 3.5x - y = 63.5 -y = -3.5x + 63.5 y = 3.5x - 63.5 x + 3.5x - 63.5 = 22 4.5x = 85.5 x = ...
|
| calculus | 7/2/2009 |
Q: 1. a = 16 cm , b = 18 cm, and c = 20 cm. 2.<C = 80° , a = 42 cm , and b = 38 cm. 3. a = 6 ...
A: you haven't given any information, like sides or angles, but here are some formulas to follow Right ...
|
| calculus | 7/1/2009 |
Q: 1. a = 16 cm , b = 18 cm, and c = 20 cm. 2.<C = 80° , a = 42 cm , and b = 38 cm. 3. a = 6 ...
A: Law of Cosines 1.) a = 16cm, b = 18cm, c = 20cm 16^2 = 18^2 + 20^2 - 2(18 * 20)cos(A) A = about ...
|
| Calculus | 6/29/2009 |
Q: Given ΔABC with : 1. <A = 54° , b= 16 cm, and c = 18 cm. Find a. 2. a = 12.5 cm, b = 17.2 ...
A: Just use the Law of Cosines or Law of Sines a^2 = b^2 + c^2 - 2bc*cos(A) a/sin(A) = b/sin(B) = ...
|
| Advance math | 6/26/2009 |
Q: Write each quadratic function in standard quadratic form f(x) = a(x – h)2 + k . Then state (a) ...
A: 1.) f(x) = x^2 - 2x - 3 f(x) = (x^2 - 2x) - 3 f(x) = (x^2 - 2x + 1 - 1) - 3 f(x) = (x^2 - 2x + 1) - ...
|
| radian and degree measure | 6/22/2009 |
Q: Express each angle in degrees : 1. 7π_ 2 2. 8π_ 5 3. 11π_ ...
A: Write it like this when going from pi to degrees, just replace pi with 180. 1.) (7pi)/2 or (7/2)pi ...
|
| Identities | 6/20/2009 |
Q: verify the identity of cos^2x=1/2(cos2x+1) ANSWER: i'm guessing you mean cos(x)^2 = (1/2)(cos(2x) ...
A: you should really work on your typing so i can better understand you. if by this you mean ...
|
| Inequalitiy | 6/17/2009 |
Q: solve |1-2x|<1/3 i tried working it, but it is just confusing. please help !! ANSWER: |1 - 2x| < ...
A: here is proof of my answer, go to www.quickmath.com click on Solve which is located under ...
|
| Precalculus: complex muber | 6/17/2009 |
Q: write each as complex number in standard form, a=bi 1. 13+square root of -16 2.squareof -16 + 4-2i ...
A: 1.) 13 ± 4i 2.) ±4i + 4 - 2i = 4 - 6i or 4 - 2i 3.) 5 + 2i 4.) -11 + 8i 5.) 2 - 2i 6.) if you mean ...
|
| Precalculus | 6/17/2009 |
Q: what the equation for the horizontal asymptote the following: F(x)=2x+6/x-1; f(x)=5/2x+1; f(x)= xto ...
A: Horizontal Asymptotes f(x) = (2x + 6)/(x - 1), HA : y = 2 f(x) = 5/(2x + 1), HA : y = 0 f(x) = (x^2 ...
|
| Inequalitiy | 6/17/2009 |
Q: solve |1-2x|<1/3 i tried working it, but it is just confusing. please help !!
A: |1 - 2x| < (1/3) this can be thought of as -(1 - 2x) < (1/3) or 1 - 2x < (1/3) 1 - 2x > (-1/3) or ...
|
| series | 6/11/2009 |
Q: 12. Determine the sum for the arithmetic series: n = 30, t1 = 25, t30 = 228 13. Determine the sum ...
A: 12. Determine the sum for the arithmetic series: n = 30, t1 = 25, t30 = 228 S(30) = (30/2)(25 + ...
|
| logarithm | 6/10/2009 |
Q: 22. Express as a single logarithm: ln 7 + 0.5 ln 9 23. Express as a single logarithm: 4 ln 2 - ln ...
A: 22. Express as a single logarithm: ln 7 + 0.5 ln 9 ln(7) + (1/2)ln(9) ln(7) + ln(9^(1/2)) ln(7) + ...
|
| HELP! | 6/6/2009 |
Q: (1-(2)^1/2)^4 - (1 + (2)^1/2)^4 = ANSWER: (1 - 2^(1/2))^4 - (1 + 2^(1/2))^4 (1 - 2^(1/2))^4 (1 - ...
A: y = cos(x)/(1 - sin(x)) y' = (cos(x)'(1 - sin(x)) - cos(x)(1 - sin(x))')/((1 - sin(x))^2 y' = ...
|
| HELP! | 6/5/2009 |
Q: (1-(2)^1/2)^4 - (1 + (2)^1/2)^4 = ANSWER: (1 - 2^(1/2))^4 - (1 + 2^(1/2))^4 (1 - 2^(1/2))^4 (1 - ...
A: y = (cos(x)^3 / 3) - cos(x) y' = (cos(x)^3 / 3)' - cos(x)' y' = -cos(x)^2*sin(x) - (-sin(x)) y' = ...
|
| HELP! | 6/5/2009 |
Q: (1-(2)^1/2)^4 - (1 + (2)^1/2)^4 =
A: (1 - 2^(1/2))^4 - (1 + 2^(1/2))^4 (1 - 2^(1/2))^4 (1 - 2^(1/2))(1 - 2^(1/2)) 1 - 2^1/2 - 2^1/2 + 2 ...
|
| algebra 2 | 5/31/2009 |
Q: how do you find the x intercept and vertical asymptote of the graph of the function of 2x^2-7x+3 ...
A: (3x + y)^4 (3x + y)(3x + y)(3x + y)(3x + y) (9x^2 + 3xy + 3xy + y^2)(3x + y)(3x + y) (9x^2 + 6xy ...
|
| Trigonmetric Identities | 5/31/2009 |
Q: Please Help me to prove this Identities.I'm having head here. 1. tan x + tan y ------------- = (tan ...
A: 1.) (tan(x) + tan(y))/(cot(x) + cot(y)) (tan(x) + tan(y))/((1/tan(x)) + (1/tan(y))) (tan(x) + ...
|
| algebra 2 | 5/31/2009 |
Q: how do you find the x intercept and vertical asymptote of the graph of the function of 2x^2-7x+3 ...
A: by this do you mean (2x^2 - 7x + 3)/(x^2 - (1/4)) the x-intercepts is whatever makes your problem ...
|
| Alg. 2 Questions | 5/28/2009 |
Q: 1. What is the vertex of the parabola y = (x + 8)^2 - 2? 2. Find the center and the radius of ...
A: 1.) vertex formula is y = a(x - h)^2 + k, where (h,k) is the vertex ANS : (-8,-2) ...
|
| math | 5/28/2009 |
Q: Which set of the equations represents the given equations after they have been cleared of fractions? ...
A: if by this you mean (2x + 16)/11 + (y - 1)/3 = 3 multiply everything by 33 3(2x + 16) + 11(y - 1) = ...
|
| mixture word problem | 5/27/2009 |
Q: i hate my math teacher because she gave us homework over something she didn't teach yet and i need ...
A: .20x + .45y = 100(.40) x + y = 100 .20x + .45y = 40 20x + 45y = 4000 x + y = 100 20x + 45y = 4000 ...
|
| Help, please! | 5/26/2009 |
Q: What is the square root of i + 1? i can't find any good explanations on the web. Thanks, Daniel
A: sqrt(i + 1) or sqrt(1 + i) a^2 + 2abi + b^2i^2 a^2 + 2abi - b^2 (a^2 - b^2) + 2abi a^2 - b^2 = 1 ...
|
| Normal Distribution and Standard Deviation | 5/26/2009 |
Q: I was was given a practice question that will be worth 7 marks on a test. But the way I did it was ...
A: z = (x - u)/A sorry i didn't use the character map to send you the right symbols. z = (72 - 60)/8 ...
|
| math | 5/21/2009 |
Q: 2/a+3 - 3/2a+6 + a+2/a^2+6a+9 =
A: that's more like it. (2/(a + 3)) - (3/(2a + 6)) + ((a + 2)/(a^2 + 6a + 9)) (2/(a + 3)) - (3/(2(a + ...
|
| math | 5/20/2009 |
Q: a^2+2/b Divide by (a+2/a) =
A: if by this you mean (a^2 + 2)/b / ((a + 2)/a) then just multiply the top by a/(a + 2) and nothing ...
|
| math | 5/20/2009 |
Q: If the fractions ax/x+y, bx/x-y, and c/2x+2y are rewritten as equivalent fractions with the least ...
A: (ax)/(x + y), (bx)/(x - y), c/(2x + 2y) Multiply everything by 2(x + y)(x - y) (2(ax)(x - y)/(2x^2 ...
|
| math | 5/17/2009 |
Q: (15a^2b^2c^2-6ab^2c+3a^2bc^2)divide by 3abc =
A: (15a^2b^2c^2 - 6ab^2c + 3a^2bc^2)/(3abc) i was going to have you take each value individually, but ...
|
| trig | 5/15/2009 |
Q: Find the center of a circle with equation x2 - 2x + y2 - 4y - 8 = 0
A: x^2 - 2x + y^2 - 4y - 8 = 0 x^2 - 2x + y^2 - 4y = 8 (x^2 - 2x + 1 - 1) + (y^2 - 4y + 4 - 4) = 8 ...
|
| math | 5/15/2009 |
Q: (7ax+3by)(7ax-3by)=
A: since you have the exact same factors, only with the sign in the middle opposite to the other, all ...
|
| arithmetic | 5/12/2009 |
Q: A car travelled 462 miles per thankful of gasoline on the highway and 336 miles per thankful of ...
A: miles per gallon 462/x = 336/(x - 6) 462x - 2772 = 336x 126x = 2772 x = 22 gallons 336/16 = ...
|
| Math | 5/7/2009 |
Q: Find a set of four consecutive positive integers such that the greatest integer in the set is twice ...
A: consecutive even/odd integers have a pattern of x, x+2, x+4, x+6... consecutive integers have a ...
|
| time and work | 5/6/2009 |
Q: Working alone, printers X,Y,and Z can do a certain printing job, consisting of a large number of ...
A: X and Y together (1/12) + (1/15) = (1/t) (5/60) + (4/60) = (1/t) (9/60) = (1/t) t = (20/3) or 6 ...
|
| physics | 5/1/2009 |
Q: What is an exponential progression? ANSWER: if i'm correct, it should look something like a ...
A: there are only so many things that can happen to it. black hole burn up from comets and other hot ...
|
| word problem | 4/30/2009 |
Q: i need this question solved: A lighthouse in Delaware Bay is known to be 120 feet tall. You use ...
A: tan(10) = 120/x x = 120/tan(10) x = 680.6ft from the light house. you have to picture the ...
|
| pre calc | 4/29/2009 |
Q: 1. How does the graph of f(x)= -x^2+1 compare to that of g(x)= x^2 ? 2. Use long division to divide ...
A: 1.) f(x) = -x^2 + 1 g(x) = x^2 if your going from graph f(x) to g(x), then to go from f(x) to g(x), ...
|
| right triangle | 4/29/2009 |
Q: Solving this right triangle? Solve the right triangle (to the nearest tenth) given B=15degrees, and ...
A: since you know this is a right triangle, and you are already given angle B. 90 - 15 = 75 ...
|
| hiii, i kind of need help : ) | 4/29/2009 |
Q: I used the quadratic formula but i keep getting the wrong answer whcih si why i need your help, id ...
A: (5sqrt(3))^2 = c^2 + 10^2 - 2(10 * c)cos(60) 75 = c^2 + 100 - 20c*(1/2) -25 = c^2 - 10c c^2 - 10c + ...
|
| calculus conic sectins | 4/27/2009 |
Q: (x+2x)^2 = 8(y-3)i need the directrix vertex and focus and y+12x-2x^2 = 16
A: i already answered the first one. y + 12x - 2x^2 = 16 y = 2x^2 - 12x + 16 y = (2x^2 - 12x) + 16 y ...
|
| calculus conic sectins | 4/27/2009 |
Q: (x+2x)^2 = 8(y-3)i need the directrix vertex and focus
A: are you sure you typed this correctly, because (x + 2x)^2 = 8(y - 3)i becomes (3x)^2 = 8(y - 3)i ...
|
| EURO MILLION CHANCES | 4/26/2009 |
Q: can you please explain it in more details e.g why you times those certain numbers and how you worked ...
A: can you repeat the previous question so that i know which question your talking about that i ...
|
| pre-calc | 4/24/2009 |
Q: 1. find the remainder when f(x)=x^3+x^2+x+2 is diveded by (x-4) 2. f(x)=x^2-9/x-3 and g(x)=x-9/x-3 ...
A: f(x) = (x^3 + x^2 + x + 2)/(x - 4) Using synthetic Division. 4 | 1 1 1 | 2 | 4 20 | 84 ...
|
| center of a cube | 4/23/2009 |
Q: Determine the center of the cube that have three of its vertices (2,3,0), (0,5,4), and (4,1,8 ).
A: first you need to find the distance between each point. (2,3,0) and (0,5,4) D = sqrt((0 - 2)^2 + (5 ...
|
| Rational Equation Help | 4/23/2009 |
Q: [(6x)/(x+4])+(4)=(2x+2)/(x-1) The Answer is: -3/2 & 2 Could you please show me how to arrive ...
A: ((6x)/(x + 4)) + 4 = (2x + 2)/(x - 1) multiply everything by (x + 4)(x - 1) 6x(x - 1) + 4(x + 4)(x ...
|
| pre-calc | 4/21/2009 |
Q: Find the exact value 5. sin(arccos sqrt5/5) Write an algebraic expression that is equivilant to ...
A: 5.) sin(arccos sqrt(5)/5) arccos or cos^-1 = sqrt(5)/5 same as saying cos(A) = sqrt(5)/5 ...
|
| Trivia Question | 4/21/2009 |
Q: My husband and I are right now doing a trivia game with our neighbors where they gave us a bunch of ...
A: a 4 by 4 dot area gives you 20 rectangles, however at ...
|
| Proving Trig Identities | 4/21/2009 |
Q: [sin^2 (A)/tan^2] +sin^2(A) [csc(A)/cos(A)] +sec(A)
A: usually when we prove something, it has to be equal to something. (sin(A)^2/tan(A)^2) + sin(A)^2 ...
|
| pre-calc | 4/20/2009 |
Q: Verify that the x values are solutions of the equation. 1. csc x – 2 = 0 (a) x=pi/3 (b) ...
A: Verify that the x values are solutions of the equation. 1.) csc(x) – 2 = 0 (a) x = pi/3 ...
|
| Trivia Question | 4/20/2009 |
Q: My husband and I are right now doing a trivia game with our neighbors where they gave us a bunch of ...
A: Here they are 1100 1100 1100 0110 0110 0110 0011 0011 0011 1110 1110 0000 0000 1110 1110 0111 ...
|
| pre calc | 4/20/2009 |
Q: The point is on the terminal side of an angle in standard position. Determine the exact values of ...
A: The point is on the terminal side of an angle in standard position. Determine the exact values of ...
|
| math question | 4/20/2009 |
Q: How do I create a function using the following characteristics: horizontal asymptote=2, vertical ...
A: f(x) = (2x - 14)/(x + 1) vertical asymptote is easy to make, since if the denominator makes the ...
|
| Precalc Trig identities | 4/19/2009 |
Q: "all x's stand for theta (1+sinx)(1-sinx)(secx+1)(secx+1) [sinx-(sinx)(cosx)]/1-cosx ...
A: for theta, you type it like this sin(A), so if by theses you mean (1 + sin(A))(1 - sin(A))(sec(A) + ...
|
| pre-calc | 4/18/2009 |
Q: What do you observe about his functions asymptotes? 1. g(x)=4|x-2|/x+1 Identify any asymptotes of ...
A: What do you observe about his functions asymptotes? 1.) g(x) = 4|x - 2|/(x + 1) there's a vertical ...
|
| equations | 4/17/2009 |
Q: solve: |2x-4| < 10
A: i'll explain so that you should be able to do any of these. |2x - 4| < 10 2|x - 2| < 10 |x - 2| < ...
|
| Math | 4/17/2009 |
Q: Pete Rossini has just graduated from college with honors. He has been offered four jobs with the ...
A: 1.) $54,000 for the first year 2.) $1071.00 per week for the first year 1071 * 52 = $55,692 for the ...
|
| Inequalities | 4/16/2009 |
Q: Graph the inequality Y < (x-2) cubed -
A: since we can't graph on this. go to www.quickmath.com click on Plot which is located under ...
|
| Implicit Differentiation | 4/15/2009 |
Q: Find y' in terms of x and y by implicit differentiation if 1) xy+√(x+y)= 1 2) sin(x+2y)= ...
A: (d/dx)(xy) + (d/dx)(sqrt(x + y)) = (d/dx)1 (xy)' = y + x(dy/dx) = y + 1 (d/dx)(sqrt(x + y)) = (x ...
|
| Trig. Identity Help | 4/14/2009 |
Q: I need help proving 2 identities. 1) csc^2 A/2 = 2sec A/sec A - 1 2) 4sin^4 A/2 = 1 - 2cosA + ...
A: if by this you mean 1.) csc(A/2)^2 = (2sec(A))/(sec(A) - 1) same as saying 1/(sin(A/2)^2) = ...
|
| math | 4/11/2009 |
Q: log x-log 3=1 5 5 ANSWER: by this do you mean log(base 5)x - log(base 5)3 = 1 log(base ...
A: you work it the same way log(base 7)21 = x + 1 log(21)/log(7) = x + 1 multiply both sides by ...
|
| verify trigonomic identity | 4/10/2009 |
Q: please help!!! this problem is killing me after 4 pages of different attempts... Verify the ...
A: (cot(x) - tan(x))/(sin(x) + cos(x)) = csc(x) - sec(x) ((cos(x)/sin(x)) - (sin(x)/cos(x))) / (sin(x) ...
|
| College Math | 4/10/2009 |
Q: Identify the Vertez and X Intercept of F(x)=25-x-2 step by step instructions.
A: did you mistype this f(x) = 25 - x - 2 do you mean 25^(-x) - 2 25 - x^(-2) are there any ...
|
| Advanced Trig equations | 4/6/2009 |
Q: Problem 1.A.) Solve equations below on [0, 2 Pi) 5csc(theta)= -6 Problem 1.B.) ...
A: if by these you mean, and i'm using A to stand for theta. Problem 1.A.) Solve equations below on ...
|
| doubt! | 4/4/2009 |
Q: How to solve expressions of this format? 1. a= 10 log10 (x/y) , where x is known and so is a, but y ...
A: 1.) a = 10 * log(base 10)(x/y) a = 10 * (log(x/y)/log(10)) a = 10 * (log(x/y)/1) (a/10) = log(x/y) ...
|
| geometry | 4/3/2009 |
Q: I have been given an isosceles right triangle with the area given as 12 inches squared and they want ...
A: which is a^2, now you want half of that to get the area of a isosceles right triangle, so how you ...
|
| about probability | 4/1/2009 |
Q: I am in the sixth grade and i have this question that is real important and it is this if i was to ...
A: i'm guessing the one you're referring to has a 10 by 10 grid. the ships cover row/column by ...
|
| pre-calculus | 4/1/2009 |
Q: The problem is sinxsin3x=cosxcos3x and i have to solve for all values. I would appreciate the help. ...
A: here is why, when you use cos(0)^-1, but cos(90) and cos(270) give you 0. to make it less ...
|
| pre-calculus | 4/1/2009 |
Q: The problem is sinxsin3x=cosxcos3x and i have to solve for all values. I would appreciate the help.
A: sin(x)sin(3x) = cos(x)cos(3x) sin(x)sin(3x) - cos(x)cos(3x) = 0 -cos(x)cos(3x) + sin(x)sin(3x) = 0 ...
|
| probability | 3/30/2009 |
Q: Three dice are thrown simultaneously. What is the probability of the scores adding to 12
A: 1/6^3 = 1/216 the combinations that can be done that add up to 12 1,5,6 = 6 ways 2,4,6 = 6 ways ...
|
| Algebra | 3/26/2009 |
Q: I am having trouble on a test prep question. I have worked it a couple of times and cant seem to get ...
A: sqrt(2x + 7) - sqrt(x + 3) = 1 using the same exact method, only taking out the 0. sqrt(2x + 7) = ...
|
| Algebra | 3/26/2009 |
Q: I am having trouble on a test prep question. I have worked it a couple of times and cant seem to get ...
A: sqrt(2x + 70) - sqrt(x + 3) = 1 sqrt(2x + 70) = 1 + sqrt(x + 3) square both sides 2x + 70 = (1 + ...
|
| Verifying Identities | 3/26/2009 |
Q: i have a quiz on it tomorrow and do not know how to do this stuff. Can you answer some of these ...
A: check with answers.yahoo.com, and please rate me for the previous questions i answered and not on ...
|
| Verifying Identities | 3/25/2009 |
Q: i have a quiz on it tomorrow and do not know how to do this stuff. Can you answer some of these ...
A: if by these you mean (sin(x)/(1 + cos(x))) + ((1 + cos(x))/sin(x)) = 2csc(x) Multiply everything ...
|
| math | 3/25/2009 |
Q: round this to the nearest thousandth:3.14159
A: 3 would be the whole number 3.1 would be the tenths place 3.14 would be the 100ths place 3.1415 ...
|
| MATHS | 3/25/2009 |
Q: Hey, I'm trying to figure out the answer to thisIf the displacement of a particle P at time t is ...
A: s'(2, 5, 7) = 3sqrt(2, 5, 7) - (1/(2sqrt(2, 5, 7))) + 3 on the second value, multiply top and ...
|
| math 080 | 3/24/2009 |
Q: how would I factor compleatly? 9x^+30x+25
A: check this out, whats the square root of 9, whats the square root of 25. times those answers then ...
|
| maths problem | 3/22/2009 |
Q: In a certain colony of bacteria each divides in to two every hour. how will be produced from a ...
A: y = 2^n y = 2^12 y = 4096 and i think you mean splits into 2, because if it divided, it would ...
|
| Daughters math question | 3/17/2009 |
Q: Use the numbers 1, 2, 3, 4, 5, and 6 to write a subtracion problem with two mixed numbers that have ...
A: 4 13/20 = 93/20 we can easily deduce that the denominators will be 4 and 5 because 20 would be ...
|
| Quadratic Simultaneous Equation | 3/16/2009 |
Q: Its a quadratic simultaneous equation. The equations are x² - y² = -5 and 2x² + xy -y² = 5 Thanks ...
A: this site tells you about factors. www.math.com/school/subject1/lessons/S1U3L1GL.html as in ...
|
| Quadratic Simultaneous Equation | 3/16/2009 |
Q: Its a quadratic simultaneous equation. The equations are x² - y² = -5 and 2x² + xy -y² = 5 Thanks
A: x^2 - y^2 = -5 -y^2 = -x^2 - 5 y^2 = x^2 + 5 2x^2 + xy - y^2 = 5 -y^2 = -2x^2 - xy + 5 y^2 = 2x^2 + ...
|
| problem | 3/16/2009 |
Q: find the exact value of tan pi/12 I do not know how to solve this problem so can you please solve ...
A: the value pi is another way of saying 180 in radians form. tan(pi/12) = tan(180/12) = tan(15) ...
|
| math sequence | 3/3/2009 |
Q: what equation could i get if i have a sequence of o, 5/2, 8/3, 17/4, 24/5?
A: when you think of it like this 0 = 1^2 - 1 5 = 2^2 + 1 8 = 3^2 - 1 17 = 4^2 + 1 24 = 5^2 - 1 this ...
|
| Trig Identities | 3/2/2009 |
Q: I have two questions. How would I verify the identities for the following? 1. ...
A: 1.) (cos(x)cot(x))/(1 - sin(x)) = csc(x) (cos(x)(cos(x)/sin(x))/(1 - sin(x)) (cos(x)^2 / sin(x))/(1 ...
|
| trig | 3/2/2009 |
Q: 2sinxsin3x=(1-cos2x)(1+2cos2x) ANSWER: 2sin(x)sin(3x) 2sin(x)(sin(x + 2x)) 2sin(x)(sin(x)cos(2x) + ...
A: check this out then, i'll take the reverse of the -8cos(x)^4 + 10cos(x)^2 - 2 of the (1 - cos(2x))(1 ...
|
| Probability | 2/26/2009 |
Q: At a certain university, 40% of the students who take basic statistics are sophomores, 45% are ...
A: so you have .40x, .45x, and .15x .20(.40)x or .08x .30(.45)x or .135x .40(.20)x or .08x ...
|
| Percentages to ml | 2/25/2009 |
Q: John needs 110ml of a 64% solution. If he only has a 44% solution and an 88% solution, how many ml ...
A: .44x + .88y = .64(110) x + y = 110 .44(x + 2y) = 70.4 x + 2y = 160 x = -2y + 160 -2y + y + 160 = ...
|
| angle of depression | 2/16/2009 |
Q: The distance between two buildings is 140 feet. You are standing on the roof of the taller building. ...
A: 90 - 35.9 = 54.1 tan(54.1) = x/140 x = 140tan(54.1) x = about 193.4 ------------------------ 90 ...
|
| logarithm problem | 2/8/2009 |
Q: Can you tell me the solution of this problem: (1) What will be the value of e to the power of minus ...
A: e^(-.642) = 1/e^(.642) = about .5262 ---------------------------------------- e^(-4.851/T) = .73 ...
|
| statement problem - mba | 1/30/2009 |
Q: can u please help solve this problem showing in detail the calculation Kleen Karpet cleaned 65 rugs ...
A: 520 * 13 = 6760 worked 100 * 5 = 500 for gallons used 20 * 50 = 1000 for machine rental so he has ...
|
| Algebra II | 1/29/2009 |
Q: How do you graph the system of linear equation, (1/3)x = (2/3)y + (5/3) and 1x - 2y = 5?
A: (1/3)x = (2/3)y + (5/3) first multiply everything by 3 x = 2y + 5 x - 5 = 2y y = (1/2)x - (5/2) ...
|
| Math Calculation | 1/24/2009 |
Q: I am trying to make a calculation and I am not sure I am doing it correctly. I want to find out 30% ...
A: here is how you find out your answers. V = n(p/100) V = Value n = number p = percent value you my ...
|
| algebra | 1/22/2009 |
Q: Please can you have a look at this question. Q: make J the subject of the formula, ...
A: if by this you mean ((j/2) + (4a/3))/L you don't have an = sign in your formula, either way ...
|
| factorization | 1/21/2009 |
Q: how do I solve this question? Factorize: 51y^2 - 2580y - 39879 Please help if possible, thank ...
A: i'm going to show you the easiest way to be able to factor anything that deals with parabolas. ...
|
| As-level Maths | 1/19/2009 |
Q: 1)Simplify: a) 10/sqrt5 + sqrt 20 b) 1/sqrt2 (2sqrt2 – 1) + sqrt2 (1-sqrt8) 2) Find the greatest ...
A: 1)Simplify: a) 10/sqrt5 + sqrt 20 if by this you mean 10/(sqrt(5) + sqrt(20)) 10/(sqrt(5) + sqrt(5 ...
|
| Sequence | 1/17/2009 |
Q: I need to tell whether the following sequence is arithmetic, geometric, or neither. Then find the ...
A: 12, 16, 25, 34, 43 a(n) = a1 + d(n - 1) a(2) = 12 + d(2 - 1) 16 = 12 + d d = 4 a(3) = 12 + d(3 - ...
|
| graphing rational functions | 1/16/2009 |
Q: "What is the vertical asymptote(s) of f(x)= x^2-x-2/x^3-2x^2-5x+6?" ANSWER: to answer this ...
A: vertical asymptotes are the easiest to find, because it deals with the denominator. the horizontal ...
|
| trig identities | 1/13/2009 |
Q: ((2tanx)/(1-tan^2x))+((1)/(2cos^2x-1))=(cosx+sinx)/(cosx-sinx)
A: ((2tan(x))/(1 - tan(x)^2))) + (1/(2cos(x)^2 - 1))) = (cos(x) + sin(x))/(cos(x) - sin(x)) ...
|
| A-level maths C1 | 1/11/2009 |
Q: 1) The first three terms of an arithmetic series are k, 7.5 and k + 7 a) Find the value of k b) ...
A: an = a1 + d(n - 1) an = k + d(n - 1) a(2) = k + d(2 - 1) 7.5 = k + d a(3) = k + d(3 - 1) k + 7 = ...
|
| Precalculus Proofs | 1/4/2009 |
Q: how do you do this proof: (1/cotx+1)+(1/tanx+1)=1
A: if by this you mean (1/(cot(x) + 1)) + (1/(tan(x) + 1)) = 1 (1/((cos(x)/sin(x)) + 1)) + ...
|
| math | 12/27/2008 |
Q: What is the volume of a swimming pool 45 feet wide, 75 feet long, and an average of 5 feet, 6 inches ...
A: assuming its a perfect box shape and not like one of those swimming pools that go from 5ft to 10ft ...
|
| problem with Horner method | 12/26/2008 |
Q: i have a problem with horner method,and want you to just give me a short description about it,and ...
A: i never really am able to follow math on that site so i just keep looking and here is what i found. ...
|
| to solve exponential equation of 2 unknown constant and two variable | 12/26/2008 |
Q: i want to solve equation y=6.11*Exp((a*x)/(x+b)), and want to know what is the value of a and b. how ...
A: if by this you mean y = 6.11 * 10^(ax/(x + b)) y/(6.11) = 10^(ax/(x + b)) ln(y/6.11) = (ax/(x + ...
|
| Probability | 12/17/2008 |
Q: Four cards are dealt from a well-shuffled standard deck of 52 cards. Find the probability that a. ...
A: a.) (4/52)(3/51)(2/50)(1/49) (1/13)(1/17)(1/25)(1/49) ANS : (1/270725) b.) ...
|
| word problem with trig functions | 12/17/2008 |
Q: a ranger's tower is located 44m from a tall tree. from the top of the tower, the angle of elevation ...
A: if you draw this out, you will know that the building is about (44/tan(36))m tall or about 61m tall ...
|
| Math | 12/16/2008 |
Q: I am stuck on 3 Trig Equations that I have tried over and over again but i cant get the correct ...
A: 1.) 2cos(x) - sin(x) = -2 for 0 < x < 2pi 2cos(x) = -2 + sin(x) cos(x) = -1 + (1/2)sin(x) sorry ...
|
| As Level Maths | 12/13/2008 |
Q: 1. Solve the inequality: 10 + x² > x(x – 2) 2. The fifth term of an arithmetic series is 14 ...
A: 1.) Solve the inequality: 10 + x^2 > x(x – 2) 10 + x^2 > x^2 - 2x -2x < 10 x > -5 ...
|
| Solving systems of Equations in three variables | 12/9/2008 |
Q: #1 36x -15y +50z = -10 2x +25y = 40 54x - 5y +30z = -160 #2 1.8x -z = 0.7 1.2y +z = -0.7 1.5x ...
A: 1.) 36x - 15y + 50z = -10 2x + 25y = 40 54x - 5y + 30z = -160 2x + 25y = 40 2x = -25y + 40 x = ...
|
| Solving Systems of equations in three variables | 12/9/2008 |
Q: x + 2y + 3z =5 3x + 2y -2z = -13 5x + 3y -z = -11
A: x + 2y + 3z = 5 3x + 2y - 2z = -13 5x + 3y - z = -11 x = -2y - 3z + 5 3(-2y - 3z + 5) + 2y - 2z = ...
|
| please check my answer | 12/5/2008 |
Q: fifth and eighth terms of a geometric series are 540 and 20 respectively. Using appropriate ...
A: the formula to use is a(n) = a1 * r^(n - 1) a(5) = a1 * r^(5 - 1) 540 = a1 * r^4 a(8) = a1 * r^(8 ...
|
| Logarithm Function | 12/3/2008 |
Q: please could you help solve the following differential equations. i. dy/dx = 4y / x(y - 3) ii. ...
A: i.) dy/dx = 4y / x(y - 3) ((y - 3)/y)dy = (4/x)dx (1 - (3/y))dy = (4/x)dx y - 3ln(y) = 4ln(x) + c ...
|
| Algebra 2 | 11/30/2008 |
Q: Please, help me with this. I do not understand if I have to include initial velocity or not. Is it ...
A: S(T) = -16T^2 + VoT + So 100 = -16T^2 + 50T + 25 -16T^2 + 50T - 75 = 0 the reason i put 100 on ...
|
| system of equations in three variables | 11/26/2008 |
Q: x+2y=12 3y-4z=25 x+6y+=20 9a+7b=-30 8b+5c=11 -3a+10c=73 2r+3s-4t=20 4r-s+5t=13 ...
A: 9a + 7b = -30 8b + 5c = 11 -3a + 10c = 73 9a + 7b = -30 9a = -7b - 30 a = (-7/9)b - (10/3) ...
|
| calculus | 11/24/2008 |
Q: simiply:2x+1/(3)(x2+x)^(2/3)
A: if by this you mean (2x + 1)/(3(x^2 + x)^(2/3)) Multiply top and bottom by (x^2 + x)^(1/3) ((2x + ...
|
| Discrete Mathematics | 11/19/2008 |
Q: Counting, Probability Distributions, and Further Topics in Probability How many different 4-letter ...
A: nCr = (n!)/(r!(n - r)!) you have 26 letters, of which one of them has been chosen for you, so you ...
|
| calculus and differentiation | 11/19/2008 |
Q: I have a question about implicit differentiation: How can I find the slope of the tangent line to ...
A: 2(x^2 + y^2）^2 = 25(x^2 − y^2) 2((x^2 + y^2)^2)' = 25(x^2 - y^2)' 4(x^2 + y^2)(2x + ...
|
| Discrete Mathematics | 11/18/2008 |
Q: Sets and Probability Two dice are rolled. Find the probabilities of rolling the given sums. a) 9 ...
A: if 2 dice are rolled you have 36 combinations a.) 3,6 : 4,5 : 4,6 : 5,4 : 5,5 : 5,6 : 6,3 : 6,4 : ...
|
| trignometery | 11/18/2008 |
Q: is (50/tan)a quantity are (50/tan),,(1/tan 50),,(cot 50),,((tan^-1)50) one and the same thing
A: i don't know what you mean by quantity. 50/tan(A) = 50cot(A) 1/tan(50) = cot(50) tan^-1(50) isn't ...
|
| help! algebra2 | 11/17/2008 |
Q: what would you get for these? 1. f(x) = 5x - 3 Find f(7) a.) 20 b.) 32 c.) 54 d.) 14 ...
A: 1. f(x) = 5x - 3 Find f(7) a.) 20 b.) 32 c.) 54 d.) 14 f(7) = 5(7) - 3 = 35 - 3 = 32 ANS : B ...
|
| probability | 11/17/2008 |
Q: I just started studying stats and I'm having trouble with my homework assignment, could you guide me ...
A: 1.) (13/52)(12/51)(11/50) = (1/4)(4/17)(11/50) = (2*2*11)/(17*2*15) = (22/255) or 1.29% chance of it ...
|
| Probability | 11/15/2008 |
Q: 1) A card is drawn at random from an ordinary pack containing 52 playing cards. Find the probability ...
A: a.) since there is only 1 4 of spades 1/52 or 1.92% b.) 13/52 + 1/52 = 14/52 = 7/26 = 26.92% c.) ...
|
| Systems of Equations in 3 Variables | 11/13/2008 |
Q: I'm pretty much stumped. I've tried all methods I can think of and still can't get the answer. I ...
A: 5a - b + 3c = 5 2a + 7b - 2c = 5 4a - 5b - 7c = -65 5a - b + 3c = 5 -b = -5a - 3c + 5 b = 5a + 3c - ...
|
| Systems of Equations in 3 Variables | 11/13/2008 |
Q: I'm pretty much stumped. I've tried all methods I can think of and still can't get the answer. I ...
A: I'll be using Cramer's Rule 5a - b + 3c = 5 2a + 7b - 2c = 5 4a - 5b - 7c = -65 +++5,-1,+3:5 ...
|
| probability - statistics | 11/12/2008 |
Q: A carinval roulette wheen contains 30 slots numbered 00,0,1,2,3,...28. 14 of teh slots numbered 1 ...
A: a.) 30 - 2(for the 0 and 00) = 28, so now you have 14/30 or 7/15 there's about a 23.33% chance of ...
|
| Three equations, three variables | 11/11/2008 |
Q: Ten apples cost a penny, and 25 pears cost two pennies. Suppose I buy 100 apples and pears for 9.5 ...
A: (1/10)a + (2/25)p = 9.5 a + p = 100 a = -p + 100 ((-p + 100)/10) + (2/25)p = 9.5 (-1/10)p + 10 + ...
|
| writing equation from a parabola | 11/11/2008 |
Q: How do you determine the coefficient for the equation of a parabola?
A: you need to plug in some points and i can show you how to do this. basically you use y = ax^2 + bx ...
|
| math review | 11/4/2008 |
Q: Sherman, Can you please check these for me? I'd really appreciate it. Thanks. 1) Convert 18 ...
A: 1.) that question is so easy here is what i'm going to do, i'm going to teach you how to google ...
|
| needing help | 11/3/2008 |
Q: sherman, I need some help stuck on a problem . If ya don't mind can you answer it and also explain ...
A: V = Bh B = 3a^2 * sqrt(3)/2 B = 3(4)^2 * sqrt(3)/2 B = 3(16) * sqrt(3)/2 B = 3(8)sqrt(3) B = ...
|
| pre-calc | 11/2/2008 |
Q: hey. so im doing this problem but i'm kind of stuck. it says: solve: (1/3)cos²x = sin²x, for ...
A: There are 2 ways to do this (1/3)cos(x)^2 = sin(x)^2 (1/3)(1 - sin(x)^2) = sin(x)^2 1 - sin(x)^2 = ...
|
| vectors | 11/1/2008 |
Q: use the vectors to find the cosines of the interior angles of the triangle with vertices (0,1)(1,-2) ...
A: (0,1) and (1,-2) D = sqrt((1 - 0)^2 + (-2 - 1)^2) D = sqrt(1 + 9) D = sqrt(10) (0,1) and (4,1) D = ...
|
| checking problems | 10/31/2008 |
Q: Can you please check these for me? I am more confident of my answers this time. Thank you ;) 1) ...
A: You really need to learn to type it so i can understand it. 1) Evaluate the determinant in the ...
|
| equation | 10/29/2008 |
Q: X + Y + Z=24 8X + 7Y + 5Z=160 Please provide me the whole solution.thanks
A: x + y + z = 24 8x + 7y + 5z = 160 8x + 7y + 5(-x - y + 24) 8x + 7y - 5x - 5y + 120 = 160 3x + 2y = ...
|
| checking problems | 10/28/2008 |
Q: Can you please check these for me? I am more confident of my answers this time. Thank you ;) 1) ...
A: 1) Write the augmented matrix for the system of linear equations. I think its A 3x - 2y + 5z = 31 ...
|
| Algebra 1 | 10/28/2008 |
Q: Gene spent 10 min riding his bicycle to a friend's house. He left his bike there and, with his ...
A: s = d/t d = st 2.75 = (r + 10)(10/60) + r(15/60) 2.75 = (r + 10)(1/6) + r(1/4) 11/4 = (r + 10)/6 + ...
|
| pre - calc | 10/26/2008 |
Q: i was wondering if you could show me the steps to prooving this equation: (tanx/1+ secx)+ (1+ ...
A: if by this you mean (tan(x)/(1 + sec(x))) + ((1 + sec(x))/tan(x)) = 2csc(x) Multiply everything by ...
|
| Finding the domain | 10/24/2008 |
Q: If a ball is thrown upward from a building 30m tall and the ball has a vertical velocity of 25 m/s, ...
A: h(t) = -5t^2 + 25t + 30 h(t) = -5(t^2 - 5t - 6) h(t) = -5(t - 6)(t + 1) a.) t = 6 seconds b.) -1 ...
|
| algrebra | 10/22/2008 |
Q: 1. A company has found that the demand for its product varies inversely as the price of the ...
A: 1.) y = k/x 400 = k/4.5 1800 = k y = 1800/8 y = 225 ------------------------- 2.) p = sqrt(q)k ...
|
| Advance Algebra | 10/21/2008 |
Q: You can buy CDs at store for $15.95 each. you can buy them online for $13.99 plus $6 for shipping. ...
A: y = 15.95x y = 13.99x + 6 15.95x = 13.99x + 6 1.96x = 6 x = 6/1.96 = 600/196 = 150/49 or about 3 y ...
|
| picograms/picomoles | 10/21/2008 |
Q: My blood test showed that my Vitamin B12 level is 348 picograms, but for certain reasons I need to ...
A: The molar mass of B-12 is 1355.37 g/mol x mol = g/(g/mol) 348 pg = 3.48 * 10^2 * 10^-12 = 3.48 * ...
|
| standard formations | 10/20/2008 |
Q: 1) If f(x) = 2x^2 - x - 3 and g(x) = x + 1, find f + g I think it is b. It has to be either... ...
A: 1.) f(x) = 2x^2 - x - 3 g(x) = x + 1 f + g = (2x^2 - x - 3) + (x + 1) f + g = 2x^2 - x - 3 + x + 1 ...
|
| surface area of a cone | 10/17/2008 |
Q: the circumference of the base of a 10metre high conical tent is 44metre calculate the length of the ...
A: S = pi * r * s s = sqrt(r^2 + h^2) C = 2pi * r 44 = 2pi * r 22/pi = r h = 10 s = sqrt((22/pi)^2 + ...
|
| geometery | 10/17/2008 |
Q: would the shape of a billiard table affect the angle of reflection?
A: if by changing the shape you mean if it were circle, then yes. If the shape were any other kind of ...
|
| few trignometric Questions? | 10/16/2008 |
Q: 2cos^2(t)=3sin(t) 5tan^2(t)+3=9sec(t)
A: 2cos(t)^2 = 3sin(t) 2(1 - sin(t)^2) = 3sin(t) 2 - 2sin(t)^2 = 3sin(t) 2sin(t)^2 + 3sin(t) - 2 = 0 ...
|
| Difficult ratio | 10/16/2008 |
Q: The ratio of Meg's money to Anne's money was 3:5. After Meg spent $12 and Anne spent some of her ...
A: (x/y) = (3/5) 5x = 3y y = (5/3)x (x - 12)/(y - z) (x - 12)/((5/3)x - z) = (2/7) 7(x - 12) = ...
|
| Solving system of equation with three variables | 10/15/2008 |
Q: -5x + 3y + Z = -15 10x + 2y + 8z =18 15x + 5y + 72 =9 Please help... My daughter is having trouble ...
A: -5x + 3y + z = -15 10x + 2y + 8z = 18 15x + 5y + 7z = 9 -5x + 3y + z = -15 z = 5x - 3y - 15 10x + ...
|
| Finite Math | 10/15/2008 |
Q: I have answered three questions for this word problem. I just want to see if this is right. Plus I ...
A: i've answered this one before. B.) that should be a 4 at the right end. d.) just plug in .7 for r ...
|
| Finite Math | 10/14/2008 |
Q: I have answered three questions for this word problem. I just want to see if this is right. Plus I ...
A: a.) Unless you plan to extend it further, you don't really need the zero. b.)Unless you plan to ...
|
| Math | 10/14/2008 |
Q: What are all possible subsets of a, b, c, d? When applying the Venn Diagram.
A: to find the number of possible subsets, use y = 2^x so the answer to your problem is 16. ( ) (a) ...
|
| simplification of logarithms | 10/13/2008 |
Q: Express log(2root10) -1/3 log(0.8) -log(10/3) in the form c+logd where c and d are rational numbers ...
A: log(sqrt(10)) - (1/3)log(.8) - log(10/3) = log(10^(1/2)) - log((8/10)^(1/3)) - (log(10) - log(3)) ...
|
| Math | 10/13/2008 |
Q: Can you explain to me why is the set of natural numbers an infinite set, but the set of blades of ...
A: the word infinite basically mean that it has no limits, but finite mean that there are limits. ...
|
| Imaginary numbers | 10/13/2008 |
Q: I came across this problem when I was looking through this book. How do you find the sqrt of ...
A: This site should help explain everything http://staff.jccc.net/swilson/complex/sqrootsimag.htm ...
|
| Finite Math | 10/13/2008 |
Q: could you help me with a couple of logarithmic questions. Thanks. Solve the logarithmic equations. ...
A: ln(2x + 1) - 1 = ln(x - 2) ln(2x + 1) - ln(x - 2) = 1 ln((2x + 1)/(x - 2)) = 1 (2x + 1)/(x - 2) = e ...
|
| please help me figure out this difference of quotients | 10/11/2008 |
Q: the problem is find f(a+h)- f(a) / h heres the thing she gave us to solve: f(x)= 3 / (x^2 +1) i ...
A: f(x) = 3/(x^2 + 1) f(a + h) = 3/((a + h)^2 + 1) f(a) = 3/(a^2 + 1) (f(a + h) - f(a))/h = ...
|
| help | 10/7/2008 |
Q: Find all the possible values of sin(3x)=square root 3 over 2
A: sin(3x) = sqrt(3)/2 3x = 60 or 120 x = 20 or 40 here are some others that will work x = 140 and ...
|
| Trigonometry - Half-Angle Formula | 10/6/2008 |
Q: I need to solve the following case III triangle using the half-angle formula, here is the triangle ...
A: a = 27, b = 21 and c = 24 2s = 27 + 21 + 24 2s = 72 s = 36 log(36 - 27) = log(9) = 0.954242509 ...
|
| Trigonometry- exact values | 10/6/2008 |
Q: Using exact values, find: a. tan 105 degrees b. sin 255 degrees Thank you for all your help!
A: a.) tan(105) = tan(60 + 45) = (tan(60) + tan(45))/(1 - tan(60)tan(45) = (sqrt(3) + 1)/(1 - ...
|
| Calc: Limits | 10/5/2008 |
Q: how do i go about answering this? I thought that factoring would be involved but how do i go about ...
A: (x^3 - 9x^2 + 23x - 30)/(x - 6) i'd use synthetic division 6`|`1`-9``23``|`-30 ``|````6`-18``|``30 ...
|
| pre-calc | 10/4/2008 |
Q: Hey there. My professor gave us a huge 50 problem assignment and I am stuck on these few remaining. ...
A: 1.) f(x) = cbrt(x - 1) g(x) = x^3 + 1 a.) f(g(x)) = cbrt(x^3 + 1 - 1) = cbrt(x^3) = x b.) g(f(x)) ...
|
| trig identities | 9/29/2008 |
Q: PLEASE HELP! #1 tanx+cotx --------- = secx cscx #2 cos(u-v) --------- = tanu cosv cosu ...
A: 1.) (tan(x) + cot(x))/csc(x) = sec(x) (tan(x) + (1/tan(x)))/(1/sin(x)) = 1/cos(x) ((tan(x)^2 + ...
|
| Finite Mathematics | 9/24/2008 |
Q: For each of the following functions, find a) f(4) b) f(-3) c) f(2.7) d) f(-4.9) f(x) = -2x + 4 ...
A: f(x) = -2x + 4 a.) f(4) = -2(4) + 4 f(4) = -8 + 4 f(4) = -4 b.) f(-3) = -2(-3) + 4 f(-3) = 6 + 4 ...
|
| Pre-Calc./Trig | 9/22/2008 |
Q: I was doing homework and right now its about finding the domain and range and zeros of an equation. ...
A: Are you talking about a line graph with dots, that just means this If the left side has an open ...
|
| find the value for a | 9/19/2008 |
Q: I have aa, 3a,... The first term in the sequence above is a, and each term after the first is 3 ...
A: a, 3a, 3(3a), 3(3(3a)), 3(3(3(3a))) or you can write it as (3^(n - 1))a this would be a geometric ...
|
| SAT math | 9/17/2008 |
Q: Which of the following is an equation of the line that has a y-intercept of 2 and an x-intercept of ...
A: we know it isn't a, c, or e for one reason, when you divide everything by 2 or 3, you have to have ...
|
| Pre-Calc | 9/14/2008 |
Q: Hey I'm in freshman in pre-calc and I've been working on this 100 problem worksheet and I'm down to ...
A: 1.) (3x^(-1/2) * 3x^(5/2))/((3x)^(3/2)) (3^2 * x^((-1/2) + (5/2))) / (3^(3/2) * x^(3/2)) (3^2 * ...
|
| logarithm bases! | 9/10/2008 |
Q: how do you find the nth term in this logarithm sequence: log[base 2]8, log[base4]8, log[base8]8, ...
A: since the only thing that changes is the base, the formula is log(base 2^n)8 just start with 1 for ...
|
| Trig. Identities | 9/10/2008 |
Q: Prove that : sin^4ϴ-1/cos^2ϴ = cos^2ϴ-2
A: if by this you mean (sin(A)^4 - 1)/cos(A)^2 = cos(A)^2 - 2 ((sin(A)^2 - 1)(sin(A)^2 + 1))/(1 - ...
|
| chemistry class/mat | 9/5/2008 |
Q: Bob has to paint a room which is 12.90m long, 9.654m wide and 10.523m high. The ceiling and the ...
A: here is what you have to do, you have to use the Surface Area for a Rectangular Box, then you have ...
|
| Functions | 9/5/2008 |
Q: sir i have problems in functions i dont know how to plot them
A: www.quickmath.com will plot them for you. or go to calculator.com click on graphing calculator, ...
|
| modulus function | 9/3/2008 |
Q: |x-2|/x-2=3
A: if you mean |x - 2|/(x - 2) = 3 instead of (|x - 2|/x) - 2 = 3, then |x - 2| = 3(x - 2) |x - 2| = ...
|
| algebra | 8/29/2008 |
Q: A lumber company owns a forest that is of rectangle shape, 1 mi by 2mi.IF the company cuts a uniform ...
A: 120 * 80 = 9600 9600 * 2 = 19200 Since they are only doing it to one side and one end, they aren't ...
|
| algebra | 8/28/2008 |
Q: A lumber company owns a forest that is of rectangle shape, 1 mi by 2mi.IF the company cuts a uniform ...
A: 1 * 2 * 3/4 = 6/4 = 3/2, so 1.5 sq. miles must remain. if you cut a uniform strip to all outer ...
|
| algebra | 8/27/2008 |
Q: commision A company pays its salespersons on a basis of a certain percentage of the first $100,000 ...
A: 175000 - 100000 = 75000 100000x + 75000y = 8500 100000x + 180000y = 14800 multiply top by -1 ...
|
| algebra | 8/23/2008 |
Q: i would appreciate it very much if you could solve it for me, thank you. Equalizing cost. United ...
A: i'm guessing you mean in one month's period 7.5x + 7000 = 6y + 8800 x + y = 1500 y = -x + 1500 ...
|
| Exponential Problem | 8/21/2008 |
Q: I am having a problem solving this equation for x: y = a ---------- -((x-c)/b) 1+ e ...
A: if you are saying you want me to solve for "x", then ok. y = a/((1 + e)^(-(x - c)/b)) this becomes ...
|
| complex no. | 8/21/2008 |
Q: how to find the square root of complex no? for example -1+i thank you
A: if your saying sqrt(-1 + i), then all i can say is, if you go to www.quickmath.com click on Solve ...
|
| Graphing Linear Inequalities | 8/18/2008 |
Q: I'm having trouble figuring these problems out, I'm getting confuse of what they're asking me. ...
A: whenever you have < or > the graph is dotted, if you have <= or >= the graph is solid. as for your ...
|
| Integration | 8/17/2008 |
Q: The number of journalists in a metropolitan region is increasing at a rate of 18t^2 + 60t ...
A: i didn't think about it, but here it is. the integration of 18t^2 + 60t is 6t^3 + 30t^2 if you ...
|
| Simplifying Fractional exponents | 8/14/2008 |
Q: a. the square root of 8x^5y^4 b. the cube root of 4x^2y^4 times the square root of 2xy c. the ...
A: d.) (x^(-1/2))^(-3) / x^(-2/3) (x^((-1/2) * -3))) / x^(-2/3) since x^(-2/3) has a negative ...
|
| Simplifying Fractional exponents | 8/13/2008 |
Q: a. the square root of 8x^5y^4 b. the cube root of 4x^2y^4 times the square root of 2xy c. the ...
A: a.) sqrt(8x^5y^4) sqrt((4x^4y^4)(2x)) just sqrt the 4 and divide the exponents of 4 by 2 ...
|
| Rational Equations | 8/13/2008 |
Q: 2 2 _ + _ x y ____________ 2 2 __ + ___ x+2 y Please simplify the ...
A: ((x - 3)/(x + 2)) - (1/(x - 2)) = ((x^2 - 2)/(x^2 - 4)) since (x + 2)(x - 2) gives you (x^2 - 4), ...
|
| Rational Equations | 8/12/2008 |
Q: 2 2 _ + _ x y ____________ 2 2 __ + ___ x+2 y Please simplify the ...
A: ((2/x) + (2/y)) / ((2/(x + 2)) + (2/y)) ((2y + 2x)/xy) / ((2y + 2(x + 2))/(y(x + 2))) ((2y + ...
|
| proving identity of trigo | 7/31/2008 |
Q: cot x - tan x = 2 cot 2x
A: cot(x) - tan(x) = 2cot(2x) (1/tan(x)) - tan(x) = 2(1/tan(2x)) (1/tan(x)) - (tan(x)^2/tan(x)) = ...
|
| algebra | 7/3/2008 |
Q: simplify: (9-x^-2)/3+x^-1)
A: if by this you mean (9 - x^-2)/(3 + x^-1) and those are suppose to be negative exponents (9 - ...
|
| college alleg | 7/2/2008 |
Q: I need help with list all of the possible zeros for f(x)= 6x^3-53x^2-11x+2
A: when i can't group factor a problem, use complete the square, or any other kind of way to solve ...
|
| Pythagorian Tripple, Sierpinski's Triangle, factorials. | 6/29/2008 |
Q: Greetings, Can you please explain to me, that what is "Pythagorian Tripple" and a Sierpinski's ...
A: if it doesn't pass the vertical line test, which means if you were to draw a vertical line through ...
|
| Mathematics | 6/16/2008 |
Q: hallo sirim form malaysia.. i have a qustion and i dont know how to solve this, can you factorize ...
A: if you mean x^2 - 28x - 480 = 0, then x = (-b ± sqrt(b^2 - 4ac))/(2a) x = (-(-28) ± sqrt((-28)^2 - ...
|
| it's about coordinates,... | 6/14/2008 |
Q: The endpoint of segment AB are : point A (1, -5) point B (9, 11) find the coordinates of the point ...
A: (1,-5) and (9,11) M = (9 + 1)/2, (11 - 5)/2 M = 10/2, 6/2 M = 5,3 this is for 4/8 or 1/2 the ...
|
| mathematics | 6/9/2008 |
Q: the height if a projectile upward is given by the formula S=V0T-16T (squared). S = ht in feet, V0 = ...
A: 64 = 128T - 16T^2 16t^2 - 128t + 64 = 0 16(t^2 - 8t + 4) = 0 now using the quadratic formula t = ...
|
| sine and cosine | 6/2/2008 |
Q: Hey Sherman -- My math instructor for trigonometry has tried time and time again to teach me how to ...
A: there's not to much of a difference between the 2. sin(x) = cos(x - (pi/2)) cos(x) = sin(x + ...
|
| Capacity | 5/30/2008 |
Q: A cylindrical tank is made of material 1.5 in. thick and has an outside circumference of 17 ft. 3.5 ...
A: since we only need the inside and not the outside to calculate volume. C = 2pi * r 17ft 3.5in = ...
|
| Solving for a power | 5/30/2008 |
Q: How do I solve for a power? Here's the example: 2.0544 = 1.04n (that's 1.04 to the nth)The answer ...
A: first of all you have to know how to write it before you can solve it, lol. 2.0544 = 1.04^n ...
|
| i'm not sure | 5/28/2008 |
Q: I have this qusetion I need the answer very quickly. Can you prove that Cos^4(theta)+sin^2(theta) is ...
A: cos(A)^4 + sin(A)^2 = 2cos(A)^2 - 1 cos(A)^4 + (1 - cos(A)^2) = 2cos(A)^2 - 1 cos(A)^4 + 1 - ...
|
| Trig Identities | 5/24/2008 |
Q: Prove the following identities Cos2θ≡Cos^4θ-Sin^4θ ...
A: cos(2A) = cos(A)^4 - sin(A)^4 taking the right side and factoring it. cos(A)^4 - sin(A)^4 = ...
|
| logarithms | 5/23/2008 |
Q: this the second part
A: I'm not 100% on the characteristics of logarithsm parts, because i've never had to known the ...
|
| logarithms | 5/23/2008 |
Q: please help me with this
A: just to let you know, you have a calculator on your computer. just click View on it, then click ...
|
| advanced math | 5/23/2008 |
Q: please explain how to do these 2 probelems (1) (2x + 5) 1/2 power = 4 ( book says answer is 11/2) ...
A: if by this you mean 1.) (2x + 5)^(1/2) = 4 2x + 5 = 4^2 2x + 5 = 16 2x = 11 x = 11/2 ...
|
| linear functions | 5/21/2008 |
Q: please help me with the following questions a)y=2x b)y=3over4x c)y=6x+7 please answer before ...
A: you have no actual question. if you are wanting me to graph, then go to ...
|
| precal- trig | 5/17/2008 |
Q: a college football pennant is in the shape of an isosceles traingle. The base is 20 long . the sides ...
A: if the sides meet at 35, then the other 2 angles can be found like this. 35 + 2x = 180 2x = 145 x = ...
|
| Logarithim | 5/15/2008 |
Q: I cannot seem to figure out log 3(2x-7)=2 and also Writing 2log^5(3x+2)-[3log^5(x-5)=2log^5x] ...
A: if by this you mean log(3)(2x - 7) = 2 log(2x - 7)/log(3) = 2 log(2x - 7) = 2log(3) log(2x - 7) = ...
|
| Proving Trig Identities | 5/11/2008 |
Q: Hey I'm Molly i have trouble with proving identities, and there was a question that i got confused ...
A: sin(x + y)/(cos(x)cos(y)) = tan(x) + tan(y) tan(x) + tan(y) = (sin(x)/cos(x)) + (sin(y)/cos(y)) = ...
|
| trigonometry | 5/11/2008 |
Q: Solve the following right triangles: a. a = 117 ft, b = 16.35ft and b. B = 8* 29', a = 32.8 ft ?
A: 117^2 + 16.35^2 = c^2 c = sqrt(13956.3225) or about 118.14ft using this C = 90, because its the ...
|
| Trig Identity (Prove Equal to one side) | 5/10/2008 |
Q: I've spent a lot of time working on this problem and i've gotten close but it never comes out right. ...
A: 3cos(x) - cot(x) = (3 - csc(x))/(sec(x)) (3 - csc(x))/(sec(x)) = (3 - csc(x))/(1/cos(x)) = (3 - ...
|
| Trig Identity (Prove equal to one side) | 5/8/2008 |
Q: (sinA+cosA-sin^3A-cos^3A) = sinAcos^2A + sin^2cosA
A: sin(A) + cos(A) - sin(A)^3 - cos(A)^3 = sin(A)cos(A)^2 + cos(A)sin(A)^2 (sin(A) + cos(A)) - ...
|
| Equation | 4/24/2008 |
Q: I'm having a brain cramp trying to solve the following problem: Supplemental inflation-adjusted ...
A: (1/2) = 1/(1 + e^(3.1 - .2t)) (1 + e^(3.1 - .2t))/2 = 1 1 + e^(3.1 - .2t) = 2 e^(3.1 - .2t) = 1 3.1 ...
|
| help! | 4/24/2008 |
Q: Simplify the expression... 7x to the negative 8 power times 6x to the 3rd power. (-10g to the 7th ...
A: y=-2x-5 y=-2x+4 Same Slope but different y-intercepts ANS : No Solution ...
|
| help! | 4/23/2008 |
Q: Simplify the expression... 7x to the negative 8 power times 6x to the 3rd power. (-10g to the 7th ...
A: 7x^-8 * 6x^3 (7 * 6) * x^(-8 + 3) 42x^-5 -------------------------- I don't know if you left ...
|
| angles | 4/22/2008 |
Q: I am a student at mcbain and i am in pre-algebra and we have to kno the following angles: ...
A: vertical is the side that goes up and down. adjacent is the one right next to the other side or ...
|
| REAL ROOTS | 4/22/2008 |
Q: How do you solve this question? (I want the whole Enchilada! Its basic AS Level maths but I can't ...
A: 18/(x^4) + 1/(x^2) = 4 multiply everything by x^4 to get rid of the fractions 18 + x^2 = 4x^4 4x^4 ...
|
| math | 4/14/2008 |
Q: In Math We Have, n\(n+1) =(n^2-n)\(n^2-1) (By multiply (n+1)) Then ...
A: if you are saying that your problem is n/(n + 1) = (n^2 - n)/(n^2 - 1) n/(n + 1) = (n(n - 1))/((n + ...
|
| pre-calculus | 4/13/2008 |
Q: 1. If a, b, c, and d are the four smallest positive angles, in ascending oder of magnitude, which ...
A: x = 3sin(A) - sin(3A) x = 3sin(A) - sin(2A + A) x = 3sin(A) - (sin(2A)cos(A) + sin(A)cos(2A)) x = ...
|
| Math inductions | 4/12/2008 |
Q: I have an upcoming Math exam (I'm in college) but i can't seem to understand math inductions. please ...
A: 4,8,12,...,4n an = a1 + d(n - 1) a(2) = 4 + d(2 - 1) 8 = 4 + d d = 4 a(3) = 4 + d(3 - 1) 12 = 4 + ...
|
| precalculus | 4/10/2008 |
Q: I was wondering if you could help me with a couple of calculus problems. If you could help me out ...
A: log(7x^2 + 30x + 2) - 2log(x + 1) = 1 log(7x^2 + 30x + 2) - log((x + 1)^2) = 1 log((7x^2 + 30x + ...
|
| Precal vectors | 4/9/2008 |
Q: Find the interior angles of the triangle with the given vertices. (-4,5), (1,10), (3,1) I really ...
A: just use the distance formula this way you'll know about what triangle we are dealing with. By find ...
|
| working with numbers | 4/3/2008 |
Q: Pat and stephen travl 750km on the XPT train from Sydney to Albury. A. the train leaves at 3.30pm ...
A: Ai.) S = D/T 85 = D/3 D = 255km -------------- Aii.) 750 - 255 = 495km ...
|
| working with numbers | 4/3/2008 |
Q: A train 1000m long travels through a 3km tunnel. If 30 seconds elaspe from the time the last ...
A: 1000m = 1km S = 3/(30/3600) S = 3/(1/120) S = 360km/h that was what i got. you can also check with ...
|
| equations | 3/31/2008 |
Q: using the equation: I = 0.8[1-10^(-0.0434t)] after ,t, sec a) what is the current after 5 s b) ...
A: a.) I = .8(1 - 10^(-.0434 * 5)) I = .8(1 - 10^(-.217)) I = about .315 ...
|
| Logarithms | 3/30/2008 |
Q: So I am stumped on how to solve these Logs: 12. log5(x - 1) + log5(x - 2) - log5(x + 6) = 0 13.a) ...
A: 12.) log(5)(x - 1) + log(5)(x - 2) - log(5)(x + 6) = 0 using rules of logarithms, this becomes ...
|
| Values of sinx | 3/28/2008 |
Q: This is what the exact question states: EG: cos 36 = (sqrt5 + 1)/4 You have also been provided with ...
A: if you are asking me to find sin(x), and not how to find out how they got cos(36) to be (sqrt(5) + ...
|
| what is the value of 4! | 3/27/2008 |
Q: what is the value of 4!
A: 4! is what is known as the factorial of 4 4! = 4 * 3 * 2 * 1 = 24 if you bring up your computer's ...
|
| percent equation | 3/26/2008 |
Q: Bev purchased a pair of shoes on sale.He received a 20% discount that saved him $16.What was the ...
A: Through trial and error, the shoes were $80. to check this P = O(1 - .20) P = .8O plug 80 in, and ...
|
| College Algebra | 3/26/2008 |
Q: my name is Sherry and I'm 52 years old and I recently returned back to school. I have solved a few ...
A: 18.) Solve the inequality for y. Simplify. -3y - 1 < 6/7y - 6 y = 29/21 or 1 3/7 -3y - 1 < ...
|
| pre-calc help | 3/24/2008 |
Q: 1) 3 cos x = sec x ; in the interval -pi < x < pi 2) cos(1/2 arcsin (5/13)) find exact value 3) ...
A: 3cos(x) = sec(x) 3cos(x) = 1/cos(x) 3cos(x)^2 = 1 cos(x)^2 = (1/3) cos(x) = ±sqrt(3)/3 x = about ...
|
| domain, vertical asymptote, and x-intercept of logarithms | 3/20/2008 |
Q: can you help me with this question please? f(x)=logbase3(4-x) and f(x)=-2log(2x-1)
A: f(x) = log(3)(4 - x) f(x) = (log(4 - x))/(log(3)) VA = 4 x-intercept = 3 y-intercept = ...
|
| synthetic division | 3/18/2008 |
Q: you have put the answer to show that x-3 is a factor of x^3+2x^2-11x-12 but i am stuck to see how ...
A: if you are replying to what i wrote, then they don't mean anything, If i don't put some kind of ...
|
| Symmetry of a square root function graph? | 3/17/2008 |
Q: What is the symmetry of f( x ) = SQRT (x)
A: don't forget that there is a negative and positive side with sqrts f(x) = sqrt(x) the symmetry ...
|
| Pre-Calc | 3/14/2008 |
Q: How would you put: f(x) = 3sin(2x) - cos(2x) into the form of: f(x) = a sin(bx - c) ?
A: f(x) = asin(bx - c) f(x) = a(sin(bx)cos(c) - sin(c)cos(bx)) f(x) = 3sin(2x) - cos(2x) f(x) = ...
|
| college trig | 3/12/2008 |
Q: 2x^2-11z+4=0 solve
A: if you really did mean 2x^2 - 11z + 4 = 0, then i have no idea. but if you meant 2x^2 - 11x + 4 = ...
|
| trig problem | 3/12/2008 |
Q: sin(3x)+ cos(2x)=0 on the scale 0-2pi
A: sin(3x) + cos(2x) = 0 sin(2x + x) + cos(2x) = 0 sin(2x)cos(x) + sin(x)cos(2x) + cos(2x) = 0 ...
|
| Trigonometric Identities | 3/11/2008 |
Q: As part of a more complex dynamics problem I have used equations of motion and trigonometric ...
A: 9.734 = 19tan(A) + 9.034tan(A)^2 this is actually quite simple 9.034tan(A)^2 + 19tan(A) - 9.734 = ...
|
| Proving with Trig Identities | 3/10/2008 |
Q: I hope you can help me. Prove that: (cosx/(1+sinx))+((1+sinx)/cosx)=2secx I've tried many different ...
A: (cos(x)/(1 + sin(x))) + ((1 + sin(x))/cos(x)) = 2sec(x) (cos(x)^2 + (1 + sin(x))^2)/(cos(x) * (1 + ...
|
| I am horrible at math | 3/9/2008 |
Q: For some reason I have been put in an advanced mathematics class at my school. I do farely well ...
A: actually i'm pretty good at trig. this site should help, ...
|
| Pre-Calculus | 3/2/2008 |
Q: I have several Questions Solve for exact solutions in interval [0,2Pi) 1. Cos(2x) + ...
A: 1.) cos(2x) + cos(4x) = 0 cos(2x) + cos(2(2x)) = 0 cos(2x) + 2cos(2x)^2 - 1 = 0 2cos(2x)^2 + cos(2x) ...
|
| Trig | 2/28/2008 |
Q: Two parts to this question. First, three roads intersect to form a triangle. We'll say angles are ...
A: 180 - (54 + 47) = 180 - 101 = 79 Angle c is 79 Law of Sines 320/sin(54) = B/sin(47) B = ...
|
| logarithmic functions | 2/27/2008 |
Q: How do I solve for: log(x+5)+log(3x-7)=2
A: log(x + 5) + log(3x - 7) = 2 log((x + 5)(3x - 7)) = 2 log(3x^2 - 7x + 15x - 35) = 2 log(3x^2 + 8x - ...
|
| Trig | 2/26/2008 |
Q: The question is: "Find the exact values of sin2a, cos2a and tan2a given the folowing information: ...
A: if you mean sin(2a) instead of sin(a)^2 cos(a) = 24/25 24^2 + y^2 = 25^2 576 + y^2 = 625 y^2 = 49 ...
|
| Pre-Calculus | 2/25/2008 |
Q: Tan(5Pi/12) using Sum or difference Identities
A: tan(5pi/12) tan((pi/6) + (pi/4)) tan(x + y) = (tan(x) + tan(y))/(1 - tan(x)tan(y)) ...
|
| logs | 2/24/2008 |
Q: how do i solve the inequality 2+4x <_ 3*2^x and the inequality log2(log64(x)) >2 the 2 and 64 ...
A: log(2)(log(64)x) > 2 log(2)(log(2^6)x) > 2 (log(2^6)x)/(log(2)) > 2 (log(x)/log(2^6))/log(2) > 2 ...
|
| trigonometric identities | 2/24/2008 |
Q: [(sin/consine)-1/(sine/consine)]/[sine/cosien)+1/(sine/consine)}
A: if you mean cosine and not consine [((sin(x)/cos(x)) - 1)/(sin(x)/cos(x))] / [((sin(x)/cos(x)) + ...
|
| algebra | 2/21/2008 |
Q: solve (x^2-6x)^2-22(x^2-6x)-135=0 and come up with the answers of 5,1,9,-3
A: (x^2 - 6x)^2 - 22(x^2 - 6x) - 135 = 0 think of this problem like this X^2 - 22X - 135 = 0 now use ...
|
| algebra | 2/21/2008 |
Q: how many solutions are there to the equation-0.2x^2+12x+11=0? how do you know?
A: sorry it took so long, for some reason when i clicked the email link on my YM and when it took me to ...
|
| pre-calc | 2/21/2008 |
Q: i am given the endpoints of the diameter of a circle with the points (-2,-3) and (4,-10). I have to ...
A: sorry it took so long, for some reason when i clicked the email link on my YM and when it took me to ...
|
| Table Talk | 2/19/2008 |
Q: The Mayberry's circular table has an area of 1256 square inches. The table opens in the middle to ...
A: 2696 - 1256 = 1440 Ac = pi * r^2 1256 = pi * r^2 (1256/pi) = r^2 r = sqrt(1256/pi) diameter = ...
|
| trig | 2/16/2008 |
Q: how do i prove a trig identies with sin(3x)+3sin(x)- 4sin^3(x). I just dont understand how to ...
A: sin(3x) + 3sin(x) - 4sin(x)^3 sin(2x + x) + 3sin(x) - 4sin(x)^3 (sin(2x)cos(x) + sin(x)cos(2x)) + ...
|
| capacity calculate | 2/14/2008 |
Q: I want know how does calculate the capacity of radius tank. for example I pour gasoline in tank and ...
A: a car can hold from 15 to 18 gallons of gas. found at ...
|
| Verifying Identities, Calculus | 2/9/2008 |
Q: (1-cos)/(1+cos)= (csc-cot)^2
A: (1 - cos(x))/(1 + cos(x)) = (csc(x) - cot(x))^2 (csc(x) - cot(x))^2 = (csc(x) - cot(x))(csc(x) - ...
|
| Convert volume of a ballon into cubic feet | 2/9/2008 |
Q: I have calculated the volume of a ballon to see how close I get to the perfect sphere 4/3 pie R3.The ...
A: is 41.5, 43.5, and 44.5 your possible radii or diameter. if so, just use your computers calculator ...
|
| precal | 1/30/2008 |
Q: i am having a lot of trouble with horizontal asymptotes and vertical asymptotes.in some problems it ...
A: ax^2 + bx + c = 0 use the quadratic formula. its the conclusion to completing the square. x = (-b ± ...
|
| precal | 1/29/2008 |
Q: i am having a lot of trouble with horizontal asymptotes and vertical asymptotes.in some problems it ...
A: to find vertical asymptotes is easy. Whenever you have a value in the denominator, just set it equal ...
|
| Algebra 2 | 1/29/2008 |
Q: solve the equations for x, a real number. (sqrt 2 + 1)^x - (sqrt 2 - 1) ^x =14 and 6^2x+4=(2^x+8) * ...
A: (sqrt(2) + 1)^x - (sqrt(2) - 1)^x = 14 ANS : 3 i found the answer out by graphing at ...
|
| Trig Identities | 1/27/2008 |
Q: ok, i have tried everything to get this proof to work, and i dont think it does, here is the ...
A: if by this you mean cos(2t) = (2 - sec(t)^2)/(sec(t)^2)) (2 - (1/cos(t))^2)/(1/cos(t)^2) ...
|
| solving trig identities | 1/18/2008 |
Q: 1 / csc^2x (1-cosx) = 1+cosx ANSWER: if you are asking 1/(csc(x)^2 * (1 - cos(x))) = 1 + ...
A: sin(x)^2((1/sin(x)^2) + (1/cos(x)^2))) = sec(x)^2 1 + (sin(x)/cos(x))^2 1 + tan(x)^2 so ...
|
| solving trig identities | 1/17/2008 |
Q: 1 / csc^2x (1-cosx) = 1+cosx ANSWER: if you are asking 1/(csc(x)^2 * (1 - cos(x))) = 1 + ...
A: IF YOU ARE SAYING (1/cot(x))((1/tan(x)) + (1/cot(x))) = sec(x)^2 (1/cot(x)) = tan(x) ...
|
| solving trig identities | 1/17/2008 |
Q: 1 / csc^2x (1-cosx) = 1+cosx
A: if you are asking 1/(csc(x)^2 * (1 - cos(x))) = 1 + cos(x) 1/((1/sin(x)^2)(1 - cos(x))) 1/(((1 - ...
|
| demand equations | 1/10/2008 |
Q: a. Suppose that a market research company finds that at a price of p = $20, they would sell x = 42 ...
A: i'd say find the midpoint. The reason for this is. as x tiles increase p would have to decrease, ...
|
| Projecting 2d points onto an arbitrary 3d plane | 1/6/2008 |
Q: I am doing some physics programming, and I need to be able to generate a circle of 3d points around ...
A: www.algebrahelp.com/calculators click on 3D Equation Graphing Calculator. for a 3D, you have to ...
|
| math q | 1/5/2008 |
Q: The sides of the large square are 16 cm. The midpoints of the sides are joined to form a new square. ...
A: The sides of the large square are 16 cm. The midpoints of the sides are joined to form a new square. ...
|
| area of a triangle | 1/3/2008 |
Q: why in some problems involving the area of a triangle do mathematicians us the symbol "k" for area ...
A: info found at http://mathforum.org/library/drmath/view/67316.html but my guess is because the ...
|
| Trigonometry | 12/31/2007 |
Q: Two hikers are wandering through heavy woods with walkie talkies. The walkie talkies have a range of ...
A: S = d/t d = St c^2 = (.17x)^2 + (.24x)^2 - 2(.17x * .24x)cos(109°10) since this is talking about ...
|
| Precal | 12/29/2007 |
Q: Use the Binomial Theorem to expand the expression and express the result in simplified form. (3x + ...
A: do to the fact that this is being cubed and not squared leaves just 2 answers 1 or 3 (3x + 2)^3 ...
|
| Prove the identities | 12/14/2007 |
Q: How do i prove this identity? cotx - tanx = 2cosx * cscx - secx * cscx
A: if by this you mean 2cos(x)csc(x) - sec(x)csc(x) 2cos(x)(1/sin(x)) - (1/cos(x))(1/sin(x)) ...
|
| plane trigonometry | 12/11/2007 |
Q: Derive the identity Cot2 A + 1 = csc2 A ANSWER: cot(A)^2 + 1 (cos(A)/sin(A))^2 + 1 ...
A: a.) 4 = 4° b.) .23 * 60 = 13.8 .8 * 60 = 48 .23 = 0°13'48" c.) pi/6 or 30° About all you do is ...
|
| plane trigonometry | 12/11/2007 |
Q: Derive the identity Cot2 A + 1 = csc2 A ANSWER: cot(A)^2 + 1 (cos(A)/sin(A))^2 + 1 ...
A: i didn't even think about it before when using the previous site i gave you csc(x)^2 = cot(x)^2 + ...
|
| Functions and Algebra | 12/10/2007 |
Q: How do I graph the problem x^2+3x-4=0? I have tried and tried again. After my problem being ...
A: go to http://www.calculator.com/calcs/GCalc.html make sure its in y = form and only type in whats ...
|
| trig. | 12/10/2007 |
Q: for class I need to prove cos(b-a)= cosb cosa+ sinb sina. I'm not even sure where to start any help ...
A: cos(x) = sin(x + (pi/2)) sin(x) = cos(x - (pi/2)) so in our case cos(x - (pi/2)) = cos(x)cos(pi/2) ...
|
| precal | 12/10/2007 |
Q: express as sum or difference sin 6x cos 2x
A: sin(6x)cos(2x) sin(3(2x)) = 3(2sin(x)cos(x)) = 3sin(2x)cos(2x) 3sin(2x)cos(2x) = ...
|
| plane trigonometry | 12/9/2007 |
Q: Derive the identity Cot2 A + 1 = csc2 A ANSWER: cot(A)^2 + 1 (cos(A)/sin(A))^2 + 1 ...
A: did you really mean to write csc(x)^2 - sec(x)^2 or did you leave out something, because when i ...
|
| trigonometric functions | 12/8/2007 |
Q: I'm taking a brief course in trigonometric and i'm having a hard time finding the value for ...
A: Here's how sin(A) = +n if 0° < A < pi , Quadrants I and II (x,y) or (-x,y) sin(A) = -n if 0° > A > ...
|
| Precalc | 12/6/2007 |
Q: Could you please help me with this problem? Use the given substitution to express the given radical ...
A: sqrt(x^2 - a^2) sqrt((a * sec(A))^2 - a^2) sqrt((a^2 * sec(A)^2) - a^2) sqrt((a^2)(sec(A)^2 - 1)) ...
|
| Precalculas | 12/6/2007 |
Q: the size of a beaver population at a national park increases at a rate of 4.3% per year. If the size ...
A: 20(5.6)^x 20(e^(ln(5.6)))^x same as saying 20e^(xln(5.6)) 20e^(1.723x) ANS : y = 20e^(1.723x) ...
|
| trig | 12/5/2007 |
Q: if A is a positive acute angle and tan a =5/6, find the value of cos2A. How do i do this
A: The easiest way to do this is like this 5^2 + 6^2 = c^2 25 + 36 = c^2 61 = c^2 c = sqrt(61) sin(A) ...
|
| pre calc | 12/3/2007 |
Q: can your show me the proof for 4((sinx)^6+(cosx)^6)= 4-3(sin2x)^2
A: 4(sin(x)^6 + cos(x)^6) 4(sin(x)^6 + (cos(x)^2)^3) 4(sin(x)^6 + (1 - sin(x)^2)^3) (1 - sin(x)^2)^3 ...
|
| factor as completely as possible | 12/3/2007 |
Q: x^2 + 1x - 56
A: right of hand i know this answer is (x + 8)(x - 7), because 8 * 7 = 56, and 8 - 7 = +1. By the way, ...
|
| Verifying Trig Functions | 12/2/2007 |
Q: I'm having some trouble with verifying some trig identities: I know this isn't as complicated as it ...
A: (sin(x) + cos(x))^2 (sin(x) + cos(x))(sin(x) + cos(x)) sin(x)^2 + 2sin(x)cos(x) + cos(x)^2 sin(x)^2 ...
|
| Population calculation | 12/1/2007 |
Q: One country population becomes exact Double after 23 years so how much percent increase the ...
A: Your talking about a country population's growth, which is usually defined as exponential growth. ...
|
| Trigonometry | 11/27/2007 |
Q: Solve the trigonometric equation over the indicated interval. |(cosx)(4sinx-8sin^3x)|=1/2 8sin^3x ...
A: If these are suppose to be absolute value marks |cos(x)(4sin(x) - 8sin(x)^3)| = (1/2) go to ...
|
| algebra | 11/26/2007 |
Q: juan rivera drove 80 miles into the country at an average rate of 55 mi/h. He then drove back on ...
A: S = D/T 55 = 80/T T = 80/55 T = 16/11 hours 45 = 80/T T = 80/45 T = 16/9 S = (80 + 80)/((16/11) + ...
|
| circle circle intersection | 11/23/2007 |
Q: suppose we have two circle as a1x^2 + b1y^2 + 2g1x + 2h1y + c1 = 0 a2x^2 + b2y^2 + 2g2x + 2h2y + c2 ...
A: a1x^2 + b1y^2 + 2g1x + 2h1y + c1 = 0 (a1x^2 + 2g1x) + (b1y^2 + 2h1y) = -c1 a1(x^2 + (2g1/a1)x) + ...
|
| Analytic Trig.--Fundamental Identities | 11/20/2007 |
Q: Can you help me simplify (1 + tanx)/(1 + cotx)?
A: (1 + tan(x))/(1 + cot(x)) (1 + (sin(x)/cos(x)))/(1 + (cos(x)/sin(x))) ((cos(x) + sin(x))/cos(x)) / ...
|
| graphing linear inequality | 11/19/2007 |
Q: can you help me graph and shade 3y+x>4?
A: for a graph and shading of this, go to www.quickmath.com click on Plot under Inequalities, type it ...
|
| Pre-Calc | 11/19/2007 |
Q: I know sin(a) is 4/7, where a is in the second quadrant. I know cos(B) is -3/8, where b is in the ...
A: for sin(A) = 4/7 to be in II Quadrant A = 180 - sin^-1(4/7) or 145.150095 for cos(B) = -3/8 to be ...
|
| pre-calc | 11/18/2007 |
Q: Help w solving for x log(base 16)x + log(base 4)x+ log(base 2)x=7
A: log(base 16)x + log(base 4)x + log(base 2)x = 7 (log(x)/log(16)) + (log(x)/log(4)) + (log(x)/log(2)) ...
|
| logarithms | 11/17/2007 |
Q: How do one go about making sense out of the logarithmic tables? Namely the characteristics and the ...
A: using the laws of logarithms and exponents log(3.6) = .55630 using inverse of operations, you get ...
|
| pre-calc | 11/13/2007 |
Q: chemists measure the acidity of an aqueous solution using pH. the pH is pH=-log(base ...
A: pH = -log(base 10)(1.3 * 10^-11) pH = -log(base 10)(13 * 10^-12) pH = -(log(base 10)13 + log(base ...
|
| Pre Claculus Trigonometry | 11/13/2007 |
Q: Prove that Cot(Theta)Divided by (1-Tan(Theta))+Tan(Theta)Divided by (1-Cot(theta) is equal to ...
A: (cot(A)/(1-tan(A))) + (tan(A)/(1-cot(A)) = 1 + tan(A) + cot(A) ((cos(A)/sin(A))/(1 - ...
|
| math analysis | 11/8/2007 |
Q: the value of a new car decreases 20% each year. complete the table. the value V(t) of the car is in ...
A: v(t) = 10000(1 - .20)^t v(1) = 10000(.8)^1 v(1) = 10000 * .8 v(1) = $8000 v(2) = 10000(.8)^2 v(2) ...
|
| Trigonometry | 11/8/2007 |
Q: Solve the trig inequality over the indicated interval. a) sin(2x) > 0 Restrictions ...
A: on the first one, there are 2 possibilties Quadrant I and III on the second one Quadrant IV ...
|
| need help | 11/7/2007 |
Q: In a 4*4*4 cube there will be 64 small cubes on each side of these what cubes will be the diognal ...
A: i don't know exactly how to state this, but the diagonal cubes are the ones on each corner and they ...
|
| Trigonometry | 11/7/2007 |
Q: Solve the trig inequality over the indicated interval. a) sin(2x) > 0 Restrictions -2pi < x ...
A: a.) sin(2x) > 0 2sin(x)cos(x) > 0 sin(x)cos(x) > 0 for this to work, sin(x) and cos(x) would have ...
|
| Apples for Sale | 11/6/2007 |
Q: Jami has two types of apples to sell today at the family's road side stand. Her mother told her to ...
A: x = .4 * (3/20) = .4 * (1/20) = $8 y = .4 * (60/2) = .4 * 30 = $12 8 + 12 = 20 20/120 = 2/12 = 1/6 ...
|
| finding formulas for function | 11/4/2007 |
Q: a)Express the side length of a square as a function of the length d of the square's diagonal, then ...
A: a.) a^2 + b^2 = d^2 since a = b a^2 + a^2 = d^2 2a^2 = d^2 a^2 = (d^2)/2 a = sqrt((d^2)/2) a = ...
|
| algebra 2 | 10/29/2007 |
Q: 2x+y+z=8 x+2y-z=-1 z=2x-y solve system.
A: 2x + y + z = 8 x + 2y - z = -1 z = 2x - y 3x + 3y = 7 x + y = (7/3) y = -x + (7/3) 2x + y + (2x - ...
|
| pre calc | 10/28/2007 |
Q: how many gallons of a 12% salt solution should be added to 10 gallons of an 18% salt solution in ...
A: (.14 to .16)(10 + x) = .12x + .18(10) (1.4 to 1.6) + (.14x to .16x) = .12x + 1.8 (.14x to .16x) - ...
|
| Roots of a quadratic equation | 10/28/2007 |
Q: If X is real and P=(3(X2+1))/(2X-1), prove that P2-3(P+3)>=0.
A: if by this you mean P = (3(x^2 + 1))/(2x - 1) P^2 - 3(P + 3) >= 0 P^2 - 3P - 9 >= 0 (3(x^2 + ...
|
| system of equations | 10/26/2007 |
Q: I'm having trouble with this problem: Let a, b, c, d, and e be the unique rational numbers ...
A: 2 = a + b + c + d + e 4 = 16a + 8b + 4c + 2d + e 6 = 81a + 27b + 9c + 3d + e 8 = 256a + 64b + 16c + ...
|
| Intercepts | 10/23/2007 |
Q: Find the equation of the lines (general form) (A) x intercept -3 y intercept 4 (B) x intercept 4 ...
A: a.) (-3,0) and (0,4) m = (4 - 0)/(0 - (-3)) m = 4/3 y = (4/3)x + 4 3y = 4x + 4 -4x + 3y - 4 = 0 ...
|
| Statistical | 10/22/2007 |
Q: We picked seven households at random and found that thy should be investigated by the Wildlife ...
A: 5,6,7,8,8,9,9 Median = 8 creatures (5 + 6 + 7 + 8 + 8 + 9 + 9)/7 = 52/7 Variance = ((5-(52/7))^2 ...
|
| PreCalculus | 10/18/2007 |
Q: tanx(sinx+cotxcosx) = secx
A: tan(x)(sin(x) + cot(x)cos(x)) = sec(x) tan(x)(sin(x) + (cos(x)/sin(x))cos(x)) = sec(x) tan(x)(sin(x) ...
|
| trig identities | 10/17/2007 |
Q: sinx/(sinx+1)/(cscx-1)/cot^2x
A: i'm guessing you mean (sin(x)/(sin(x) + 1)) / ((csc(x) - 1)/(cot(x)^2)) (sin(x)/(sin(x) + 1)) * ...
|
| trig identities | 10/16/2007 |
Q: I am having some trouble with a couple of identity problems. I appreciate any help I can get from ...
A: please clarify somethings first, then i will help you out. Do you mean 1.) (sin(a + b + c) + sin(a ...
|
| Density | 10/16/2007 |
Q: Just wondering if you could help me with this question. Metal weighs, 13.333g. If the volume of the ...
A: D = M/V D = 13.333g/(6.22 - 5.01) D = 13.333g/(1.21mL) D = about 11.019 g/mL you have to subtract ...
|
| World Population | 10/15/2007 |
Q: If the world population of 5.5 billion people were gathered together in one spot, how large an area ...
A: 2 * 2 * 5.5 * 10^9 = 4 * 5.5 * 10^9 = 22 * 10^9 = 2.2 * 10^10 or 22 billion square feet or about ...
|
| Problem Solving | 10/15/2007 |
Q: I was wondering if you can help me with the following problem? Thank you in advance for your time ...
A: If you are saying that each month he puts in an additional 505. I don't know if i'm doing this right ...
|
| Rations and Proportions | 10/15/2007 |
Q: I was wondering if you can help me solve the following problems. 32 is 14% of what number? I am ...
A: of means times is means equals 32 is 14% of x 32 = 14%x 32 = (14/100)x 32 = (7/50)x 1600 = 7x x = ...
|
| I NEED HELP!! | 10/11/2007 |
Q: I noticed that you have a very high rate of answering questions. Can you help me with the problem ...
A: if you are asking 177 subtracted from 241, which 241 - 177 is the same as 241 + (-177) = 64 ```13 ...
|
| I NEED HELP!! | 10/11/2007 |
Q: I noticed that you have a very high rate of answering questions. Can you help me with the problem ...
A: To Boston 65 = 442/x x = 442/65 x = 6 hours and 48 minutes don't forget to add the 1 hour of time ...
|
| - and + calculations | 10/5/2007 |
Q: AnotherWorking with the multiplication of fractions, an example from my study book is: -6 1/4 x 5/9 ...
A: -125/36 lets do it like this -(125/36) it takes 3 36s to get to 108, which leaves 17, so that ...
|
| Real Roots | 10/5/2007 |
Q: I am studying for the TExES Generalist 4-8 exam. One of the practice questions is as follows: Find ...
A: 3x^2 - 45 + 22x 3x^2 + 22x - 45 using the quadratic formula x = (-b ± sqrt(b^2 - 4ac))/(2a) x = ...
|
| Adv. Maths | 9/30/2007 |
Q: i've tried to solve this equation by completing by square but couldn't find a conclusive answer. Can ...
A: 3x^2 - 2x - 6 = 0 3x^2 - 2x = 6 x^2 - (2/3)x = 2 x^2 - (2/3)x + (1/9) = (19/9) (x - (1/3))^2 = ...
|
| maths | 9/30/2007 |
Q: what would be the numbers in the sequence , , , , ,6,13,20
A: 6, 13, 20, an = a1 + d(n - 1) a(2) = 6 + d(2 - 1) 13 = 6 + d d = 7 a(3) = 6 + 7(3 - 1) a(3) = 6 ...
|
| Pre-Calc | 9/27/2007 |
Q: I need to find both values for x, in two equations, to the nearest thousandth if x is between (or ...
A: Just to make sure, did you mistype this one, or is it the way its suppose to be. 9sin(x) - 3 = ...
|
| trig identities | 9/26/2007 |
Q: Prove: (1-cos x)/sin x = 1/(cosec x + cot x)
A: 1/(cosec(x) + cot(x)) 1/(csc(x) + cot(x)) 1/((1/sin(x)) + (cos(x)/sin(x))) 1/((1 + cos(x))/sin(x) ...
|
| integration | 9/25/2007 |
Q: find the finite region in the postive quadrant bounded by the curve y =cos^3x and the curve y= ...
A: Sorry i don't do integration, but here is what i got. cos(x)^3 = sin(x)^3 sin(x)^3/cos(x)^3 = 1 ...
|
| Math | 9/17/2007 |
Q: if you would be able to answer the following questions it would be a big help. Thank you for your ...
A: 1.35 liters = 1350 mL 50.5 + 30 + 1350 + 2455.7 = 3886.2mL or 3.8862L 250 * .5 = 125L or 125000mL ...
|
| sine | 9/13/2007 |
Q: how to solve x+2sinx=2 3 dp explain simply please ANSWER: unless you wrote something down wrong, ...
A: if you mean x + (2sin(x)) = 2 or (x + 2)sin(x) = 2, www.quickmath.com doesn't get an answer. ...
|
| the term "cubed" | 9/12/2007 |
Q: A friend and I were debating what the math term "cubed" means...I believe that three cubed ...
A: x^3 = x * x * x now just insert a value for x. here is what its called that squared deals in ...
|
| Calculus | 9/11/2007 |
Q: Sherman, I have looked at this problem long enough. I do not know where to begin. Given that ...
A: this is actually easier than you think. A = tan^-1(4/3) this is the same as saying tan(A) = (4/3) ...
|
| Plane Trigonometry | 9/10/2007 |
Q: Verify the following Identity: cos2x=cot^2(x-1)/cot^2(x+1)
A: if by this you mean cos(2x) = (cot(x - 1)^2)/(cot(x + 1)^2) if not, let me know, because both ...
|
| advance algebra | 9/9/2007 |
Q: can u please solve it because im just not doing it right and tell me the steps because im supposed ...
A: |m + 3| = 12 - 2m USING THE SAME METHOD ±(m + 3) = 12 - 2m m + 3 = ±(12 - 2m) m + 3 = 12 - 2m or ...
|
| advance algebra | 9/9/2007 |
Q: can u please solve it because im just not doing it right and tell me the steps because im supposed ...
A: |t - 4| - 5 = 0 |t - 4| = 5 using the same method ±(t - 4) = 5 t - 4 = ±5 t = 9 or -1 just keep ...
|
| Plane Trigonometry | 9/5/2007 |
Q: Solve the following oblique triangle: a = 627.7, b = 412.2, A = 66* 47'
A: 627.7/(sin(66°47')) = 412.2/sin(B) sin(B) = 412.2sin(66°47')/(627.7) B = ...
|
| Plane Trigonometry | 9/5/2007 |
Q: Simplify the following: sin(90°+ x) sin(180°+ x) + cos(90°+x) cos(180°- x)
A: sin(90°+ x) sin(180°+ x) + cos(90°+x) cos(180°- x) sin(90 + x) = sin(90)cos(x) + sin(x)cos(90) ...
|
| alg II/trig | 9/3/2007 |
Q: Give the first six terms of the sequence defined by: a1=1 a(k+1)=1+[1/a(k)] for k>=1
A: a(k + 1) = 1 + (1/(a(k))) a(k) = 1 + d(k - 1) a(k) = 1 + dk - d dk = a(k) - 1 + d a(k + 1) = 1 + ...
|
| Quadratic Equation | 9/2/2007 |
Q: 3x squared + 10x = 8
A: Using the Completing the Square method 3x^2 + 10x = 8 x^2 + (10/3)x = (8/3) x^2 + (10/3)x + (25/9) ...
|
| Mixture Problems | 9/2/2007 |
Q: How many liters of a 35% aciid solution should be mixed with a 14% acid solution to oobtain 70 ...
A: .35x + .14y = 70(.2) .35x + .14y = 1.4 35x + 14y = 140 5x + 2y = 20 x + y = 70 5x + 2y = 20 ...
|
| Help with Pre-cal | 8/30/2007 |
Q: I need some help with my Precalculus homework. I'm tryng to find the range for g(x)=5+ the square ...
A: g(x) = 5 + sqrt(4 - x) y = 5 + sqrt(4 - x) or 5 - sqrt(4 - x) switch the x and y, then solve for y ...
|
| Straight Line And Functions | 8/26/2007 |
Q: i wonder if you can help me. Im currently studying maths in school; im from scotland so im unsure ...
A: Using (2,3) and (4,5) as your 2 main coordinates. M = ((4 + 2)/2),((5 + 3)/2) M = (6/2),(8/2) M = ...
|
| Logarithms | 8/17/2007 |
Q: Please help with 10^(2x-1)=e^(4x-3) Thanks!
A: 10^(2x - 1) = e^(4x - 3) (2x - 1)ln(10) = (4x - 3)ln(e) (2x - 1)ln(10) = 4x - 3 (2x)ln(10) - ln(10) ...
|
| currency | 8/7/2007 |
Q: i dont understand currency converting if i had 250 euros and wanted it changimg back into pounds at ...
A: if you are talking about the british pound, then 1 british pound = about 1.5 euros 250 british ...
|
| math | 8/5/2007 |
Q: here is one i just cant get.you are given two equations which are both true, and you are asked to ...
A: is this a multiple choice or a procedure. here is how it is done by substitution ax + by = c dx + ...
|
| math | 8/4/2007 |
Q: you are about to factor a equadratic equation involving some x-'s,some x's and a plain number.you ...
A: if the sign in front of the plain number is if middle sign is negative and the last sign is ...
|
| RE: Math | 8/3/2007 |
Q: I just have a few quick questions. I tried to figure these out on my own and I couldn't understand ...
A: 7(7) = 49, leaves 3 Bs 5(4) = 20, leaves 4 Ps assuming that the ones left over get together then ...
|
| pre-calc/calc | 8/1/2007 |
Q: A particle moves along the x-axis so that at any time t its position is given by ...
A: assuming that x(t) is the acceleration, because i'm not good a word problems. x(pi/2) = ...
|
| math | 7/31/2007 |
Q: kitchen floor tiles that each measure 12 inches by 12 inches (1 sq. foot.)your kitchen measures 12 ...
A: 12 * 10 = 120 4 * 10 = 40 120 + 40 = 160 ANS : 160 sorry i wasn't picturing it in my head. here ...
|
| Work word problem | 7/31/2007 |
Q: Good Day!! Here's the problem: One painter can paint an entire house in ten hours. A second painter ...
A: the Algebra Says is correct. since it takes the first one 10 hours to do one house, his average is ...
|
| RE: log | 7/30/2007 |
Q: I have 3 quick questions I was wondering if u could explain to me. 1.)If $4000 is deposited into an ...
A: 1.) y = 4000(1 + .03)^x y = 2000(1 + .05)^x 4000(1.03)^x = 2000(1.05)^x 2(1.03)^x = (1.05)^x ...
|
| Math | 7/24/2007 |
Q: Can you please help and explain how to calculate teh value of the discriminant of x^2+4x+4=0 ...
A: lets do it this way (ax + c)(bx + d) means that you have 2 connections (ax + c)^2 means you have 1 ...
|
| maybe you can maybe you cant | 7/23/2007 |
Q: i know it says you dont do calculus but since you are the only one available i need it by tomarrow i ...
A: sec(x)' = (1/cos(x))' = (1'cos(x) - 1cos(x)')/(cos(x)^2) = (0 - (-sin(x)))/(cos(x)^2) = ...
|
| Statistics | 7/17/2007 |
Q: For Exercises 23-26, do the following: a. Determine the mean, median, and the standard deviation. b. ...
A: 36, 26, 33, 28, 31 26, 28, 31, 33, 36 a.) mean = (26 + 28 + 31 + 33 + 36)/5 = 154/5 = 30.8 median ...
|
| Math | 7/16/2007 |
Q: If you are given the equation of a rational function how can you tell if the graph has a ‘hole’ and ...
A: look at the denominator. if at anytime the denominator gives you a 0 value, the problem cannot be ...
|
| Polynomial and Rational Functions | 7/16/2007 |
Q: Just one quick question. I'm having a hard time figuring out thisExplain why you can’t multiply both ...
A: (3x + 5)/(x + 2) <= 2 3x + 5 <= 2x + 4 x <= -1 since we know that you can't have a x = -2 value ...
|
| maths subject | 7/16/2007 |
Q: I am trying to find out the name of a particular mathematics subject. But I do not know what it is ...
A: arithmetic sequence www.ltcconline.net/greenl/Courses/103B/seqSeries/ARITSEQ.HTM you can also have ...
|
| investment interest rates | 7/16/2007 |
Q: The question states: Pat invested a total of $3000. Part of the money yields 10% interest per ...
A: sorry it took so long, i had to ask someone for help to see what i was doing wrong. x + y = 3000 ...
|
| PreCalculus | 7/11/2007 |
Q: Can you walk me through the steps of solving this equation and others like it. Your help is greatly ...
A: (1528,27) and (5907,50) m = (50 - 27)/(5907 - 1528) m = (23/4379) (1528,27), m = (23/4379) 27 = ...
|
| precalc | 7/6/2007 |
Q: Graph the quadratic function. Specify the vertex, axis of symmetry, maximum or minimum value, and ...
A: s = 2 + 3t - 9t^2 s = -9t^2 + 3t + 2 s = -(9t^2 - 3t - 2) Use the quadratic formula t = (-(-3) ± ...
|
| Trigonometry | 6/23/2007 |
Q: Some help. please ! a) log tan A = 00.6323 b) a= 627.7, b= 412.2 , A = 66° 47'( oblique ...
A: If you meant something else, just let me know or you can use the same method. By the way, whats with ...
|
| Math Q | 6/22/2007 |
Q: i was given a question that i have no clue how to do it was find the sum of the roots 4x^2 - 3x - ...
A: 4x^2 - 3x - 8 = 0 x = (-b ± sqrt(b^2 - 4ac))/(2a) x = (-(-3) ± sqrt((-3)^2 - 4(4)(-8)))/(2(4)) x = ...
|
| Trigonometry | 6/19/2007 |
Q: inbox: leggi messaggio Precedente Successivo Chiudi Any help ? Da: ...
A: i.) a = 627.7 b = 412.2 A = 66°47' Using a/sinA = b/sinB = c/sinC 627.7/sin(66°47') = 412.2/sin(B) ...
|
| math | 6/17/2007 |
Q: How would I find the vertex and graph on y=x(squared)+5? Please show mw how. THANK YOU
A: y = x^2 + 5 same as saying y = x^2 + 0x + 5 using x = (-b)/(2a) x = -0/(2(1)) x = 0 y = 0^2 + ...
|
| Algebra | 6/16/2007 |
Q: Given the following values 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, x, and y, form: # A polynomial of three ...
A: y = ±ax^3 y = ±ax^3 ± bx^2 y = ±ax^3 ± bx^2 ± cx ± d --------------------------------- y = aex^(b ...
|
| mathmatics | 6/12/2007 |
Q: An extention ladder adjusts in length from 10 feet to 16 feet. Suppose you've leaned your ladder ...
A: a^2 + b^2 = c^2 9^2 + b^2 = 10^2 81 + b^2 = 100 b^2 = 19 b = sqrt(19) or about 4.3589 this means to ...
|
| math | 6/12/2007 |
Q: Suppose you drop a ball from the top of a five story building onto the sidewalk 70 feet below. How ...
A: assuming there is no wind resistance on the ball. Objects travel at 9.8 m/s^2 or 32.1740 ft/s² ...
|
| five questions | 6/12/2007 |
Q: 1. what is the most $0.41 stamps you can buy for $7.31 2. Find 35% of 63. 3. Ci=onvert 87.5% to a ...
A: 1.) 7.31/.41 = 17.83 ANS : 17, because if you bought 18, you would have to pay more, so 17 is the ...
|
| adv. algebra | 6/12/2007 |
Q: find an angle complementary with an angle measuring 4pi/5. That equals 144 degrees right, so how ...
A: (4pi/5) ± (pi/2) = (8pi ± 5pi)/10 = (13pi/10) or (3pi/10) just keep in mind the distance between ...
|
| Motion problem | 6/11/2007 |
Q: A motorboat can go 14 miles downstream on a river in 20 minutes. It takes 30 minutes for this boat ...
A: 14 = (1/2)(x - w) 14 = (1/3)(x + w) 14 = (1/2)(x - w) 28 = x - w x = w + 28 (1/3)(w + 28 + w) = 14 ...
|
| five questions | 6/10/2007 |
Q: I missed 6 out of 42 questions on a mathmatices test. What p[ercent did i get correct? 2. Find the ...
A: 1.) (42 - 6)/42 * 100 = 85.7% or about 86% ------------------- 2.) 336 * .06 = $20.16 The sales ...
|
| Modulus function | 6/9/2007 |
Q: Solve the equation: |3x + 2| = 1
A: |3x + 2| = 1 this can be rewritten as ±(3x + 2) = 1 3x + 2 = ±1 3x = -3 or -1 x = -1 or (-1/3) ...
|
| Functions | 6/9/2007 |
Q: What is the difference between the co-domain and the range of a function? &how do you find the ...
A: A set within which the values of a function lie (as opposed to the range, which is the set of values ...
|
| Trigonometric Equations | 5/31/2007 |
Q: I'm struggling for a solution for the following problem. In the range of 0 <= t <= 360, 3 Cos^2 t ...
A: Treat this problem likes its a quadratic equation by using the quadratic formula 3cos(t)^2 - ...
|
| Special Right Triangles | 5/30/2007 |
Q: I don't really get how to solve these problems.
A: http://rds.yahoo.com/_ylt=A0geu.GN9FxGdHQB_JFXNyoA;_ylu=X3oDMTB2b2gzdDdtBGNvbG8DZQRsA1dTMQRwb3MDMQRz ...
|
| Mileage | 5/24/2007 |
Q: I get paid $0.48 for every mile I drive. Gas this morning was at $3.55/gal. My vehicle gets ...
A: 3.55/20 = $.01775 per mile .48 - .01775 = $.3025 profit for each mile. Thats not including the ...
|
| Atomic Mass | 5/23/2007 |
Q: Can you please help with the following question What is the atomic mass of NE? Isotope ...
A: are you just wanting some info on this http://ie.lbl.gov/education/parent/Ne_iso.htm ...
|
| differentiation | 5/22/2007 |
Q: 1. differentiate y = Sin x 2. y = 2 cos x 3 y = 10(Square Root)x
A: if you are wanting me to differentiate all 3, then 1.) y = sin(x) y' = cos(x) 2.) y = 2cos(x) y = ...
|
| math query | 5/17/2007 |
Q: Find the values of m,n E R for which the system of equations x+2y=1; 2x+my=n (a)possesses a unique ...
A: x + 2y = 1 2y = -x + 1 y = (-1/2)x + (1/2) 2x + my = n my = -2x + n y = (-2/m)x + (n/m) ...
|
| TURNING POINT | 5/8/2007 |
Q: arrived at.. 2x^2-5x-3=0 ...and then i was told he divided both side by 6...i dont understand why. ...
A: all he did was factored it to find the x-intercepts of the derivative y = 4x^3 - 15x^2 - 18x + 12 ...
|
| precalculus | 5/7/2007 |
Q: find all solutions of the equation: cos x(2 sin x +1)=0 also here are some other ones i couldn't ...
A: (cos(x))(2sin(x) + 1) = 0 cos(x) = 0 x = (1/2)pi or (3/2)pi 2sin(x) + 1 = 0 2sin(x) = -1 sin(x) = ...
|
| straight line points | 5/7/2007 |
Q: ..i really want to understand the steps in solving these bellow..i have been working them out but it ...
A: 1.) (-2,3) and (-1,5) m = (5 - 3)/(-1 - (-2)) m = 2/1 m = 2 3 = 2(-2) + b 3 = -4 + b b = 7 ANS : ...
|
| Pre-Calc | 5/6/2007 |
Q: prove the identity: 1/1-cosx + 1/1+cosx = 2csc(squared)x ANSWER: (1/(1 - cos(x))) + (1/(1 + ...
A: (sec(x)^2 + csc(x)^2) - (tan(x)^2 + cot(x)^2) ((1/cos(x)^2) + (1/sin(x)^2)) - ((sin(x)^2/cos(x)^2) ...
|
| Pre-Calc help | 5/5/2007 |
Q: i need to find the center, vertices, foci and asymptotes of the hyperbola: 16y^2 - x^2 - 6x - 128y + ...
A: 16y^2 - x^2 - 6x - 128y + 231 = 0 16y^2 - 128y - x^2 - 6x + 231 = 0 (16y^2 - 128y) - (x^2 + 6x) + ...
|
| logarithims and exponents | 5/4/2007 |
Q: please listen this is a project and i solved arond 10 pages and these are the questions i faced some ...
A: Q2.) 1) find an equation that represents the number of bacteria ( t ) hours after the original count ...
|
| solving inverse and simplyfying exponents | 4/27/2007 |
Q: Ok I'm having trouble turning these equations algebraically to inverse funtions....I think I know ...
A: y = (1/2)x^2 + 2 x = (1/2)y^2 + 2 x - 2 = (1/2)y^2 2x - 4 = y^2 y = sqrt(2x - 4) ANS : y^-1(x) = ...
|
| equations | 4/25/2007 |
Q: but before i wanted to solve the quadractic equation first. i need to see how your answer ends ...
A: for a graph, go to www.calculator.com/calcs/GCalc.html (i) 4x^2 - 144=0 4(x^2 - 36) = 0 4(x - 6)(x ...
|
| math | 4/24/2007 |
Q: i'm having real trouble with a problem, A circle of radius (r) is inscribed in an equilateral ...
A: you are given a circle with radius (r), so if there is no value for "r", then just right it as ...
|
| math | 4/24/2007 |
Q: i'm having real trouble with a problem, A circle of radius (r) is inscribed in an equilateral ...
A: This is quite easy to compute Area of Triangle - Area of Circle = Shaded Area SA = (a^2 * ...
|
| Rounding to the nearest hundred-thousandth | 4/16/2007 |
Q: Round 0.8394263 to the nearest hundred-thousandth. I'm confuse when it's says nearest, does that ...
A: .1 = tenths .01 = one-hundredths .001 = thousandths .0001 = ten-thousandths .00001 = 100 thousandths ...
|
| nonlinear systems | 4/13/2007 |
Q: i must use substitution method and not sure how to solve these. i tried and im not getting the ...
A: 1.) xy = 6 2x - y = 1 2x - y = 1 -y = -2x + 1 y = 2x - 1 (2x - 1)x = 6 2x^2 - x = 6 2x^2 - x - 6 = ...
|
| Law of Uninhibited Decay | 4/11/2007 |
Q: The voltage of a certain conductor decreases over time according to the law of uninhibited decay. ...
A: y = x * e^(-rt) y = 40 * e^(-r * 2) 10 = 40e^(-2r) (1/4) = e^(-2r) ln(1/4) = -2r r = (-1/2)ln(1/4) r ...
|
| Exponenets | 4/9/2007 |
Q: i need help simplifying a couple of exquations.... 2x^-1(x^2y^3-3y^6) (4^1/2+25^1/2)^2 ...
A: if by these you mean (2x^-1)(x^2y^3 - 3y^6) ((2x^-1)(x^2y^3)) - ((2x^-1)(3y^6)) (2 * x^(-1 + 2)y^3) ...
|
| proving trig identies | 4/9/2007 |
Q: (sec theta-tan theta)(1+sin theta)=cos theta
A: (sec(A) - tan(A))(1 + sin(A)) ((1/cos(A)) - (sin(A)/cos(A))(1 + sin(A)) ((1 - sin(A))/(cos(A)))(1 + ...
|
| Algebra | 4/6/2007 |
Q: Can you help me with this problem? I hate word problems anyway.On word problems I can't seem to get ...
A: vO = 32ft/s a.) s = -16t^2 + 32t b.) s = -16(1) + 32(1) = -16 + 32 = 16ft c.) s = -16t^2 + 32t s ...
|
| coordinate geometry | 3/26/2007 |
Q: Please answer my questions: The incentre of the triangle with vertices (1,ã3),(0,0) and (2,0) is? A ...
A: (1,sqrt(3)),(0,0), and (2,0) (1,sqrt(3)) and (0,0) D = sqrt((0 - 1)^2 + (0 - sqrt(3))^2) D = ...
|
| math problem | 3/26/2007 |
Q: is my reasoning correct? solve for x: 2^2x-3(2^x)-4=0 2^x*(2^x)-3(2^x)-4=0 2^x(2^x-3)=4 ...
A: if by this you mean 2^(2x) - 3(2^x) - 4 = 0 instead of (2^x * 2^x) - 3(2^x) - 4 = 0, just write it ...
|
| coordinate geometry | 3/25/2007 |
Q: Please answer my questions: The incentre of the triangle with vertices (1,ã3),(0,0) and (2,0) is? A ...
A: On The incentre of the triangle with vertices (1,ã3),(0,0) and (2,0) is? do you mean (1,sqrt(3)) ...
|
| re references "to the power" | 3/18/2007 |
Q: you answered a question posted on line with text that included: "^n is to represent powers, like x^2 ...
A: yes there is. squared = ^2 cubed = ^3 quartic = ^4 the rest i don't think there really is a name ...
|
| pre-calc help! | 3/8/2007 |
Q: I need some major help!! Find the value of theta for which each equation is true. tan(theta)=-1 ...
A: tan(A) = -1 A = tan^-1(-1) A = (7pi)/4 or (3pi/4) Or you can use the formula (3pi/4) + xpi ...
|
| pre-cal | 3/6/2007 |
Q: Find the indicated angle theta. It has an obtuse triangle with 18 as the opposite 7 as the adjacent ...
A: Law of Cosine a^2 = b^2 + c^2 - 2bc(cos(A)) b^2 = a^2 + c^2 - 2ac(cos(B)) c^2 = a^2 + b^2 - ...
|
| Game & A Recipe | 3/5/2007 |
Q: Sherman, Hello, I have two questions for you. First question is for the game Battlefield 2. ...
A: since i don't know the console this is played on, all i can say is try www.gamefaqs.com ...
|
| check if answers are right..please | 3/2/2007 |
Q: Can you check these answer for me.. y=5x^2-10x+7 X Y=5X^2-10X+7 ...
A: do you remember that graph website i gave you, if you had typed in your problem, click enter on the ...
|
| quadratic | 2/28/2007 |
Q: equation.. nothing happens, when i click next...please advice...like you advice to draw that site ...
A: didn't you check out the site i gave you. i did forget to tell you that you need java script to use ...
|
| quadratic | 2/27/2007 |
Q: sqrt(b^2 - 4ac) c = 7 - k sqrt((-10)^2 - 4(5)(7 - k)) sqrt(100 - 20(7 - k)) sqrt(100 - 140 + 20k) ...
A: by the way, it didn't show up correctly when using the character map, but the ? is suppose to be an ...
|
| quadratic | 2/27/2007 |
Q: please help me solve these...i wanted to compare with my answers. (a) draw the quadractic for ...
A: for "a", go to http://www.calculator.com/calcs/GCalc.html type in only 5x^2 - 10x + 7, leaving out ...
|
| Trig? | 2/25/2007 |
Q: I was wondering if you can help me out.. ---PROBLEM--- An isoceles triangle has a base of 22cm. and ...
A: 2x + 36 = 180 2x = 144 x = 72 Law of Sines a/sinA = b/sinB a/sin(72) = 22/sin(36) a = ...
|
| finding fractional percent | 2/1/2007 |
Q: But the question is how to show mathematically a fraction of a percent. Back to my example, in ...
A: 4/15 = .266666666666 .2666666666 * 100 = 26.666666666% this is the same as saying 26 2/3% Other ...
|
| finding fractional percent | 2/1/2007 |
Q: How do you find a fractional percent? For example, I am finding the percent of 4 out of 15. I know ...
A: quite easy, you know that whenever you get a decimal, and you multiply that by 100 in order to show ...
|
| Pre-Calculas | 1/31/2007 |
Q: i have a question on how to solve a logrithmic expression. the problem is... log(base2)5+ ...
A: log(2)5 + log(2)7 log(2)(5 * 7) log(2)35 this is only allowed because both the 5 and 7 have the ...
|
| Find sin | 1/28/2007 |
Q: How do I find sin 75 in it's exact form?
A: sin(75) = sin(45 + 30) = sin(45)cos(30) + sin(30)cos(45) = (sqrt(2)/2)(sqrt(3)/2) + ...
|
| College algebra and writing quotients | 1/25/2007 |
Q: A homework problem is (3.86 X 10^15)*(2.15 X 10^-7). I need to write the quotient. When I do the ...
A: Your problem looks like multiplication which is a product and not a quotient (3.86 * 10^15)(2.15 * ...
|
| deviding the cube | 1/20/2007 |
Q: Is it possible to devide a cube made of 27 little cubes into trhee identical parts (something like a ...
A: Yes. 9 + 9 + 9 = 27 The Cube is 3 by 3 by 3 or 27 cubes (3 * 3) = 9, you have 3 identical 3 by 3 ...
|
| Equivalent Fractions | 1/17/2007 |
Q: How do you do Equivalent fractions? How do you Multiply and Divide Fractions?
A: without any problems to go by, here is what i can tell you. Equivalent Fractions you ...
|
| geometry | 1/16/2007 |
Q: Prove a square may be inscribed in any triangle.
A: Draw a square, and on the bottom of the square, extend the bottom line, now go from the point of the ...
|
| math | 1/9/2007 |
Q: a garden with an area of 105 square meters is surrounded by a sidewalk of uniform width. The ...
A: (19 - 2w)(11 - 2w) = (19 * 11) - 105 209 - 38w - 22w + 4w^2 = 209 - 105 4w^2 - 60w + 209 = 104 4w^2 ...
|
| Pre-Calculus | 1/7/2007 |
Q: 1. Find the vertex, focus, and directrix of 4y^2-4y-4x+5=0 I am having problems find the standard ...
A: 4y^2 - 4y - 4x + 5 = 0 4y^2 - 4y - 4x = -5 (4y^2 - 4y) - 4x = -5 4(y^2 - 4y) - 4x = -5 (y^2 - 4y) - ...
|
| trig problem | 1/2/2007 |
Q: I have heard that you are the best math expert available on this site, please help me!! X is ...
A: i don't know if you are the same person or not, but i did a problem just like this before, like 2 or ...
|
| Pre Calculus Trig. Solving Equations | 1/1/2007 |
Q: SORRRY, just a few more questions... A) I understand everyhting up until the end. How did you go ...
A: A) I understand everyhting up until the end. How did you go from sin(x) = (sqrt(3)/2) to x = ...
|
| Pre calc trig Review | 1/1/2007 |
Q: Sorry, but I have one last question. I asked this question to both experts Jack Cheng and Sherman D ...
A: (sqrt(3) + 1)/(1 - sqrt(3)) = (1 + sqrt(3))/(1 - sqrt(3)) In math, we were always told not to leave ...
|
| Pre Calculus Trig. Review | 1/1/2007 |
Q: I had a long trig review packet to do over Christmas break. I have completed most of the questions ...
A: tan(A + B) = (tan(A) + tan(B))/(1 - tan(A)tan(B)) tan(105) = tan(45 + 60) tan(45 + 60) = (tan(45) ...
|
| Pre Calculus Trig. Review | 1/1/2007 |
Q: I had a long trig review packet to do over Christmas break. I have completed most of the questions ...
A: 1) Q: Solve for all values of x: sinx=-1 (in radians). A: x= 3pi/2 + n times 2pi (Let n= an ...
|
| Pre Calculus Trig. Solving Equations | 1/1/2007 |
Q: SOLVE for X in each of the following: a) X is between 0 and 2pi (meaning show answer in radians??) ...
A: a) X is between 0 and 2pi (meaning show answer in radians??) 2sin^2 x = 2 + cos2x 2sin(x)^2 = 2 + ...
|
| Pre-Calc: Trigonometry | 12/31/2006 |
Q: Please help me!! a) simplify completely: tanx + cotx / csc^2 x b)simplify completely: sin(pi + x) ...
A: "a" is correct, but "b" isn't quite correct. just change the signs of the +cos and -cos, and change ...
|
| trig question | 12/27/2006 |
Q: This question was on a Math B regent exam in Jan. 2003. ACCORDING TO THEIR ANSWER KEY THE CORRECT ...
A: Here is how they get it. sin(50 - 37)/250 = sin(37)/y sin(13)/250 = sin(37)/y y = ...
|
| help | 12/22/2006 |
Q: Solve the equation for 0<X<2pi. square root of 2 times cos X + 1 =0
A: i'm assuming you mena sqrt(2)cos(x) + 1 = 0 since you didn't parenthesis, it could also be ...
|
| simplifying equations | 12/22/2006 |
Q: Solve the equation for X is between 0 and 360 degress. square root of 2 cosX + 1 =0I need help ...
A: Even though this isn't really a follow-up question, i will answer it. square root of 2 cosX + 1 =0 ...
|
| simplifying equations | 12/22/2006 |
Q: I need help simplifying the equation: (sinX + cos X)^2 +(sinX-cosX)^2. THanks!!!
A: (sin(x) + cos(x))^2 + (sin(x) - cos(x))^2 ((sin(x) + cos(x))(sin(x) + cos(x)) + ((sin(x) - ...
|
| Proving Identities | 12/19/2006 |
Q: I am suppose to prove the identity cscBsecB=cotBtanB. I am not sure if I did the proof correctly ...
A: csc(B)sec(B) = cot(B)tan(B) (1/sinB)(1/cosB) = 1/(sinBcosB) = Other ways to write it is ...
|
| equations | 12/18/2006 |
Q: 1) Sqrt(x+1) = 1 2) Sqrt (x^2+4) = 2 Sqrt(2) 3) 3/x = 2/(x-1) - 2/(x^2-x)
A: Sometimes its best to undo things before you use inverse operations. Let me show you what i mean ...
|
| plane trigonometry help | 12/16/2006 |
Q: hey, again can you help with these two last questions i got them incorrect also must show work ...
A: 1.) If you are talking about him specifically and not from the building he is standing on, then ...
|
| Trigonomery help | 12/16/2006 |
Q: Hey, can you help with me with these two questions i tried to solve but got them incorrect must show ...
A: 12sin(30°) - 6tan(45°) + (sec(45°)/52) Assuming that you do mean that sec(45°) is over 52 Using a ...
|
| please help | 12/15/2006 |
Q: I need to know how to do these ones: x + 7 / x+2 > x - 1 & x^2 - 3x + 2 < or = 0 & x^2 - y = 3x ...
A: (x + 7)/(x + 2) > x - 1 x + 7 > (x - 1)(x + 2) x + 7 > x^2 + 2x - x - 2 x + 7 > x^2 + x - 2 x^2 - 9 ...
|
| Copyright Infringement | 12/13/2006 |
Q: My name is James Baer, and I'm the Lead Online Math Faculty Member at South University. Your ...
A: I think you have the wrong person. My ID is Sherman not Sharon. The website you gave me was asked ...
|
| algebra | 12/12/2006 |
Q: i need to know how to complete the square of m raised to the exponent of 2 + 10m + 18=0
A: m^2 + 10m + 18 = 0 subtract 18 from both sides m^2 + 10m = -18 find half of 10, square it, and ...
|
| Help Pre Calc | 12/5/2006 |
Q: i have a question i missed class due to a flue and im not sure how to solve this quesstion Find a ...
A: m(o(x)) = m(sqrt(x + 2)) m(sqrt(x + 2)) = 3(sqrt(x + 2))^2 = 3(x + 2) = 3x + 6 m(o(x)) = 3x + 6 ...
|
| Pre Calc | 12/5/2006 |
Q: Suppose y is inversely proportional to x. If y=6 when x=4, find the constant of proportionalityand ...
A: y = k/x 6 = k/4 k = 24 8 = 24/x x = 24/8 x = 3 "Constant of proportionality" is 24 f(x) = 24/x is ...
|
| Help Pre Calc | 12/5/2006 |
Q: i have a question i missed class due to a flue and im not sure how to solve this quesstion Find a ...
A: what am i to simplify. are you asking for m(n(o(x))) or something like that. is the problem ...
|
| trig help | 12/1/2006 |
Q: 1). Simplify the following expressions so that they involve a function of only one triangle: A.sin ...
A: www.sundials.co.uk/tbcal.htm is where i got my info, i just didn't understand what was what. On A ...
|
| plane trigonometry | 11/28/2006 |
Q: Solve the following oblique triangles: 9. a=31, b=15, c=17. 10. a=23.47, B=115°30',C=20°29' 11. ...
A: using these formula Law of Cosines a^2 = b^2 + c^2 - 2bc(cosA) b^2 = a^2 + c^2 - 2ac(cosB) c^2 = ...
|
| Trigonometry Help please | 11/28/2006 |
Q: 1. Reduce (csc^2 x - sec^2 X) to an expression containing only tan x. 2.Verify the following ...
A: Lucky for you i love trying to figure these out. 1.) Reduce (csc^2 x - sec^2 X) to an expression ...
|
| algebra II | 11/28/2006 |
Q: [8 7] X= [3 -6] 1 1 -2 9
A: if you are saying that 8,7,1,1 are in one box and 3,-6,-2,9 are in the second box, then 8,7,1,1 * x ...
|
| solving problems using percent equation | 11/27/2006 |
Q: My son has to make a circle map using information recorded..number of minutes...type of programming ...
A: 2/60 = 1/30 = about 3.33% 49/60 = about 81.67% Take those and multiply them by 3.6 or (18/5) So 2 ...
|
| Need Help Vectors | 11/26/2006 |
Q: I miss this class and cant figure it out. A person leaves home and walks 2 miles due west, then ...
A: I prefer to draw this out. If you notice it looks like a trapezoid Here is how you do it, if you ...
|
| cant seem to understand this answer | 11/22/2006 |
Q: 1. the ordered pair that each point represents; 2. the quadrant in which the ordered pair ...
A: This is basically self-explainitory Quadrant I (x,y) Quadrant II (-x,y) Quadrant III (-x,-y) ...
|
| Help | 11/22/2006 |
Q: I have a problem proving an identity the identity is 1-Tan(square)^2 x/1+Tan(square)^2 x = cos2x
A: If by this you mean (1 - tan(x)^2) / (1 + tan(x)^2) = cos(2x) (1 - (sin(x)/cos(x))^2) / (1 + ...
|
| math | 11/21/2006 |
Q: 4xsquared-17
A: 4x^2 - 17 = 0 4x^2 = 17 x^2 = (17/4) x = sqrt(17/4) x = (1/2)sqrt(17) or (-1/2)sqrt(17) for a ...
|
| Mathematics Extended Essay Topic | 11/19/2006 |
Q: my name is Ahalya and I am currently enrolled in the IB Diploma Program (12th Grade). As part of our ...
A: This may have been done before. The Many Ways To Solve Quadratics Completing the Square Quadratic ...
|
| Lottery | 11/13/2006 |
Q: Euro Millions, on the ticket it advises there is a 1 in 76,275,360 chance of winning the jackpot. It ...
A: Here is how you do it (50/1)(49/2)(48/3)(47/4)(46/5) = 2118760 (9/1)(8/2) = 36 2118760 * 36 = ...
|
| Algebra | 11/13/2006 |
Q: Solve for x 3^2x-3^x+1 + 2 = 0
A: 3^(2x) - 3^(x + 1) + 2 = 0 (3^2)^x - (3^x * 3^1) + 2 = 0 (3^x)^2 - 3(3^x) + 2 = 0 did you notice ...
|
| Probabiliy questions | 11/13/2006 |
Q: 1. A fair die and coin are tossed once. What is the probability of head on a coin and an even ...
A: 1.) since half of the die numbers are even and half of the coin is heads (1/2)(1/2) = (1/4) ANS : ...
|
| Trig... err | 11/13/2006 |
Q: I'm having a problem proving this identity. tan(sqaured)*sin(squared)=tan(squared)+cos(sqaured)-1
A: (tan(x))^2 * (sin(x))^2 = (tan(x))^2 + (cos(x))^2 - 1 tan(x)^2 * sin(x)^2 = tan(x)^2 - 1 + cos(x)^2 ...
|
| Mathematics | 11/11/2006 |
Q: I want to know what is... 1 quart= ounces 8 ounces= tablespoons 4 tablespoons= ...
A: 1 pint = 16 ounces 1 quart = 2 pints = 32 fluid ounces ----------------- 1 pint = 2 cups = 16 ...
|
| Pre-cal Help | 11/5/2006 |
Q: y=-3sin(5x-pi) y= -2sec x+1 y=tan(2x-pi/3)-1 Can you help me get the answers for these 3 problems? ...
A: I'm assuming you're wanting a graph, if so, go to http://www.calculator.com/calcs/GCalc.html type ...
|
| Sequences | 11/5/2006 |
Q: I need the next two stages in this number sequence but I can't figure it out!!!! 4,6,10,14,22,_,_ ...
A: 2(n + x) = q 2(1 + 1) = 2(2) = 4 2(2 + 1) = 2(3) = 6 2(3 + 2) = 2(5) = 10 2(4 + 3) = 2(7) = 14 2(5 ...
|
| Advanced Math Word Problem | 11/5/2006 |
Q: This problem is from the college entrance test, COMPASS. Here is a copy and paste form of it. If ...
A: S = D/T Distance in this case is the job Ss = 1/4 Sl = 1/6 St = 1/2 (1/4) + (1/6) + (1/2) (3/12) ...
|
| solving system of equations with three variables | 11/2/2006 |
Q: We are learning how to solve system of equations using three variables. I understand it for the most ...
A: 6a - 2b = 18 3b + 5c = 34 a + 6c = -28 6a - 2b = 18 3a - b = 9 -b = -3a + 9 b = 3a - 9 a + 6c = ...
|
| math | 11/1/2006 |
Q: How do you calucate or the formula for this question. What is the perimeter of a 20-gon that ...
A: as far as i know of, you can't have a 20-gon with 362°, since the interior angles of all polygons ...
|
| Math operations | 10/31/2006 |
Q: I am in fourth grade and my teachers can't answer this question for me. Can you tell me are there ...
A: logarithms y = log(x) natural logarithms : y = ln(x) exponential : y = ae^x trigometry : sin(x), ...
|
| math conversion | 10/31/2006 |
Q: I have an oil tank with 288.0 gallons of oil. One gallon is 231 inches cubed. What is the volume of ...
A: 288 gallons 1 gallon = 231 in^3 231/(12^3) = 231/1728 288 * (231/1728) = 66528/1728 ANS : about ...
|
| Pre Cal | 10/31/2006 |
Q: I x + 1 l - I y I = 3 absolute vale x + 1 subtact absolute value y equals three I need to graph ...
A: |x + 1| - |y| = 3 -|y| = -|x + 1| + 3 |y| = |x + 1| - 3 For a graph, go to www.quickmath.com, click ...
|
| pre-calculus | 10/30/2006 |
Q: sec (2 squared) theta + tan theta = 0 restriction = (0 less than or equal to theta less than ...
A: (secA)^2 + tanA = 0 0 <= A <= 2pi secA^2 = tanA^2 + 1 (tanA^2 + 1) + tanA = 0 tanA^2 + tanA + 1 = ...
|
| Question | 10/27/2006 |
Q: Find y-intercept and x intercept in the equestion y= -x^2+4x-5.
A: If you don't have it already, you need to have java script, if you do, then just let me know, ...
|
| Mathematics | 10/24/2006 |
Q: why that we called the subject math into mathematics?
A: i hope this answers your question [Origin: 1350¨C1400; ME mathematic < L math¨¥matica (ars) < Gk ...
|
| math elimination | 10/22/2006 |
Q: a shopping mall has entrances located at A(4,10), B(5,7), and C(-7,3). An information booth is to be ...
A: (5,7) and (-7,3) M = (-7 + 5)/2 , (3 + 7)/2 M = (-2/2), (10/2) M = -1,5 (4,10) and (-7,3) M = (-7 + ...
|
| fractional percents | 10/17/2006 |
Q: how do you change fractional percents into decimals?
A: first change the fraction into a decimal percent, then divide that by 100, to get your decimal ...
|
| mathematics | 10/16/2006 |
Q: can you plese solve the x in this equation logb x= 3logb 1/2 + logb 2 + 2logb 4 + logb 5
A: log(b)x + log(b)y = log(b)(xy) ylog(b)x = log(b)(x^y) 3log(b)(1/2) + log(b)2 + 2log(b)4 + log(b)5 ...
|
| Advance addition | 10/12/2006 |
Q: What is the sum of the first one hundred even numbers?
A: 2 + 100 = 102 4 + 98 = 102 6 + 96 = 102 8 + 94 = 102 10 + 92 = 102 (50/2) * 102 = 25 * 102 = 2550 ...
|
| Advanced Algebra | 10/10/2006 |
Q: Solve by substitution & elimination: x+y+z=10 2x-y+z=2 -x+2y-z=5 I'm just not understanding how to ...
A: x + y + z = 10 2x - y + z = 2 -x + 2y - z = 5 Let me use these, because they are easier x + y + z ...
|
| TRIANGLE MATHS | 10/1/2006 |
Q: I'M A PARENT AND MY 12 YEAR OLD SON CAME HOME THE OTHER DAY AND ASKED HOW YOU DO TRIANGLAR MATHS, I ...
A: you might have something wrong. ```8 `-```- 2``+``6 are the numbers -8, 6, and 1, or 8, 6, 1 If ...
|
| Sovle equation | 9/30/2006 |
Q: how i can solve this equation? Practically (how i can get theta1 and theta2 in terms of theta?) ...
A: By this do you mean 3cosA + 4cosB = 3 - 2cosC 3sinA + 4sinB = 1.95 - 2sinC where as A = theta1 B ...
|
| billion | 9/30/2006 |
Q: I´m spanish and in my language a billion is a million by a million (1.000.000.000.000)but in english ...
A: use , instead of . when writing it 1 = uno or One 10 = diez or Ten 100 = ciento or one-hundred ...
|
| Calculus help | 9/30/2006 |
Q: Find the relationship relating x and y if C is the point (1,7), D is the point (1,13), Q is the ...
A: DQ = sqrt((x - 1)^2 + (y - 13)^2) CQ = sqrt((x - 1)^2 + (y - 7)^2) so |sqrt((x - 1)^2 + (y - ...
|
| area and volume | 9/29/2006 |
Q: 1.If a triangle measures 7cm on side a, 13cm on side c, what would side b measure? a.218(my answer) ...
A: 1.) I need at least one angle to help you, also is this a right triangle. I need more info. ...
|
| solve this equation | 9/29/2006 |
Q: Grad student at OSU here, brushing up on my algebra. How do I solve for x when my equation is ...
A: y = 26150 * x^(.523) (y/26150) = x^(.523) (y/26150) = x^(523/1000) (y/26150)^1000 = x^(523) x = ...
|
| math | 9/29/2006 |
Q: i have a few questions, 1)Warren has 40 coins(all nickles, dimes, and qurters)worth $4.05. He has 7 ...
A: n + d + q = 40 n = d + 7 (d + 7) + d + q = 40 d + 7 + d + q = 40 2d + 7 + q = 40 2d + q = 33 q = ...
|
| math | 9/26/2006 |
Q: A MACHINE IS SUPPLIED ENERGY AT A RATE OF 4,000 W AND DOES USEFUL WORK AT A RATE OF 3,760 W. WHAT IS ...
A: 3760/4000 = .94 or 94% Efficiency The EFFICIENCY of an electrical device is the ratio of power ...
|
| logarithm | 9/23/2006 |
Q: 1/100=log(10x+2)
A: (1/100) = log(10x + 2) same as saying (1/100) = ln(10x + 2) e^(1/100) = 10x + 2 e^(1/100) - 2 = 10x ...
|
| Complete the square? | 9/22/2006 |
Q: "at the point you have to divide by half, then square it, and add the result to both sides." Right. ...
A: "the QUADRATIC FORMULA is the CONSLUSION to the COMPLETING THE SQUARE method " if you put your ...
|
| Complete the square? | 9/22/2006 |
Q: I think I understand now... but one last thing... when you take the half of the 3/2, ain't ya ...
A: at the point you have to divide by half, then square it, and add the result to both sides. here is ...
|
| Probability | 9/19/2006 |
Q: I have few questions, but I really don't know how solve them. Maybe you can help me in some way...? ...
A: 1.) (3, 4, 5, 6)/6 2 even numbers out of 6 sides ANS : (1/3), assuming you only have a 6 sided cube ...
|
| sequences | 9/18/2006 |
Q: Which number best completes the sequence 107 214 642 2568 12840 Possiable answer 1. 76400 ...
A: Here is the pattern 107(n + 1)! whereas "n" is any number. 107 * (1 + 1)! = 107 * 2! = 107 * 2 = ...
|
| curve sketching | 9/18/2006 |
Q: i)Given say y=(a/x^2)+(b/x) ii)also 1>b>3 how do I deal with part(ii) when sketching the curve? ...
A: y = (a/(x^2)) + (b/x) y = (a + bx)/(x^2) y = (bx + a)/(x^2) or (1/(x^2))(bx + a) here is what you ...
|
| Advanced math/ trig, precalculus | 9/17/2006 |
Q: state the domain of each function. f(x)=3x/x^2-5 how do i do it?
A: (3x)/(x^2 - 5) x^2 - 5 =‚ 0 x^2 =‚ 5 x =‚ sqrt(5) i would use the not equal sign, but the site ...
|
| Coefficients | 9/17/2006 |
Q: Based on the definition of coefficients I would say that -3 is the coefficient in the equation ...
A: this will definately enlighten you think of -3x + 12, like this -3(x^1) + 12(x^0) although there ...
|
| Co-ordinates, Points and lines | 9/16/2006 |
Q: the line 3x - 4y=8 meets the y axis at A. The point C has co-ordinates (-2,9). the line through C ...
A: 3x - 4y = 8 -4y = -3x + 8 y = (3/4)x - 2 (-2,9), m = (-4/3) 9 = (-4/3)(-2) + b 9 = (8/3) + b 27 = 8 ...
|
| mathematics | 9/4/2006 |
Q: i am in year 10 extension maths and would like to know the answer to thisf(x)=4x^2-2x+25, where the ...
A: f(x) = 4x^2 - 2x + 25 x = (-b ± sqrt(b^2 - 4ac))/(2a) x = (-(-2) ± sqrt((-2)^2 - 4(4)(25)))/(2(4)) ...
|
| graphing Calculator | 9/4/2006 |
Q: i just bought a graphing calculator and my friend informed me that you could put games on it and i ...
A: first you need a cord that you can use to hook your TI-83 graphing calculator to your computer, then ...
|
| Precal | 9/2/2006 |
Q: Name all the values of x that are not in the domain of the given function. 1.f(x)=3/x-1 ...
A: 1.) f(x) = 3/(x - 1) x cannot equal 1 ------------------------ 2.) f(x) = (x^2 - 18)/(32 - x^2) ...
|
| trig | 9/2/2006 |
Q: in trying to solve the equation for "k": (sinx/(1-cosx))-(sinx/(1+cosx))=kcotx I end up with ...
A: ((sin(x)/(1 - cos(x)) - ((sin(x)/(1 cos(x)) = kcot(x) (((sin(x) * (1 cos(x)) - ((sin(x) * (1 - ...
|
| pre calculus | 8/31/2006 |
Q: find the difference between the pair of points (-2,-1) (1,-6)
A: (-2,-1) lies in Quadrant III (1,-6), lies in Quadrant II D = sqrt((1 - (-2))^2 + (-6 - (-1))^2) D = ...
|
| trigonometry | 8/27/2006 |
Q: could you explain me the meaning of half angle formula? how can we take out value of sin 22.5? ...
A: sin(A/2) = sqrt((1 - cos(A))/2) 22.5 = 22 and (5/10) = 22 and (1/2) = 45/2 so this is really ...
|
| maths...dimensions | 8/21/2006 |
Q: question 3, 4, and 5, i worked out question 1 and 2. The upper half of the ellipse [(x^2)/25] + ...
A: As far as #1 goes, go to http://www.calculator.com/calcs/GCalc.html type in 4sqrt(1 - ((x^2)/25)), ...
|
| Identities | 8/21/2006 |
Q: sin2x + sin4x + sin6x = 4(cosx)(cos2x)(sin3x) very hard question, already asked tutors for help but ...
A: sin(2x) = 2sinxcosx sin(4x) = -4cosxsinx^3 + 4cosx^3sinx sin(6x) = 6cosxsinx^5 - 20cosx^3sinx^3 + ...
|
| Pre-cal | 8/20/2006 |
Q: given that x is and integer such that -2 is less than or equal to x and less than 2. a.state the ...
A: x^2 + y = 5 y = -x^2 + 5 -2 <= x < 2 y = -(-2)^2 + 5 y = -(4) + 5 y = -4 + 5 y = 1 y = -(-1)^2 + ...
|
| Unity symbol | 8/16/2006 |
Q: I am looking for a unity symbol, perhaps taken from math symbols, to use in a graphic representing a ...
A: i have looked everywhere and i couldn't find what you were talking about. So if you could send me ...
|
| Maths: Sin2x | 8/12/2006 |
Q: x is an angle. given sin x = 6/7, and 1/2 pi < x < pi, find the exact values of cos x, tan x, sin ...
A: sinA = y/r cosA = x/r tanA = y/x sinA = 6/7 x^2 + y^2 = r^2 x^2 + 6^2 = 7^2 x^2 + 36 = 49 x^2 = 13 ...
|
| equation of circle in standard form and find center and radius | 8/8/2006 |
Q: 2(x^2 - 4x + 4 - 4) + 2(y^2 - 6y + 9 - 9) + 24 = 0 at this step, i don't understand where the +4 - ...
A: I thought you might ask that Its using the completing the square method. 2(x^2 - 4x) + 2(y^2 - 6y) ...
|
| equation of circle in standard form and find center and radius | 8/8/2006 |
Q: Write the equation of the following circle in standard form. Find its center and radius. 2x² + 2y² ...
A: (x - h)^2 + (y - k)^2 = r^2 2x^2 + 2y^2 - 8x - 12y + 24 = 0 2x^2 - 8x + 2y^2 - 12y + 24 = 0 (2x^2 - ...
|
| SO confused..please help | 8/7/2006 |
Q: find the domain of the function: F(x)=sqrt(2x+3) and F(x)=1/x^2-2x-2
A: f(x) = sqrt(2x + 3) since (-2/3) would make this 0, and all negative values would make this ...
|
| Pre-Calc...I'm stuck... | 8/6/2006 |
Q: Find the zeros of y=3x(to the fifth)+4x(to the fourth)-2x(to the third) I am so stuck -- the only ...
A: y = 3x^5 - 4x^4 - 2x^3 (x^3)(3x^2 - 4x - 2) = 0 x = (-b ± sqrt(b^2 - 4ac))/(2a) x = (-(-4) ± ...
|
| math | 8/5/2006 |
Q: In a right triangle, the hypotenuse equals 50 feet, the base is unknown, and the height is 10 feet ...
A: a^2 + b^2 = c^2 a = base c = 50 b = height a + 10 a^2 + (a + 10)^2 = 50^2 a^2 + ((a + 10)(a + 10)) ...
|
| Algebra II equations | 8/2/2006 |
Q: how to solve log x 64=3 2x square-4x-3=0
A: if by this you mean log(x)64 = 3 x^3 = 64 cbrt both sides x = 4 ------------------------ 2x^2 - ...
|
| finite math | 8/1/2006 |
Q: 1. The line parallel to 6x + 14y = 20 2. A revenue functions is R(x) = 28 and a cost functions is ...
A: 1.) 6x + 14y = 20 14y = -6x + 20 y = (-3/7)x + (10/7) ANS : y = (-3/7)x + b now just insert any ...
|
| trig question, using answer from another post | 7/31/2006 |
Q: http://experts.about.com/q/Basic-Math-657/Trig-Pointgs.htm I read this earlier and tried to apply ...
A: You must had did it correctly, since that is the right answer, but here is what i would had done. ...
|
| Simplifying Algebraic Expressions | 7/27/2006 |
Q: (2x(squared)+5x-3 over x+2) times (9x+18 over 1-2x): the expression written out: (Fraction)Two x ...
A: ((2x^2 + 5x - 3)/(x + 2)) * ((9x + 18)/(1 - 2x)) ((2x^2 + 5x - 3)(9x + 18))/((x + 2)(-2x + 1)) (((2x ...
|
| intermediate algebra | 7/24/2006 |
Q: 3Radical34y^7a^2
A: are you saying cbrt(34y^7a^2), if so, then cbrt(34) * cbrt(y^7) * cbrt(a^2) cbrt(34) * cbrt((y^6) ...
|
| converting to octal | 7/23/2006 |
Q: When doing this conversion from decimal to octal: 129, the correct answer is 201o, why is there a 0 ...
A: 129/8 = 16.125, 16 with remainder of .125 .125 * 8 = 1 Octal = 1 16/8 = 2.0, 2 with no remainder 0 ...
|
| Pre-Calculus (Derviatives) | 7/22/2006 |
Q: What is the derivative of (x)^4/3
A: if by this you mean x^(4/3), whereas x is raised by (4/3), then next time you should type it like ...
|
| Circles | 7/21/2006 |
Q: I asked a question a few minutes ago and couldn't figure out how to ammend the question on this ...
A: c = 2 sqrt(r^2 - d^2) (c/2) = sqrt(r^2 - d^2) ((c^2)/4) = r^2 - d^2 ((c^2)/4) + d^2 = r^2 r = ...
|
| alg | 7/20/2006 |
Q: how do you make tan^2x/1+secx equal secx-1 ?
A: ((tanx)^2)/(1 + secx) = secx - 1 ((sinx/cosx)^2)/(1 + (1/cosx)) = secx - 1 ((sinx/cosx)^2)/((cosx + ...
|
| pre calc | 7/17/2006 |
Q: This is a hwk question and i just wanted a little help Use the grapg of "function f" to sketch the ...
A: f(x) = x^2 y = -f(x) + 4 this just means y = -(x^2) + 4 It moves up 4 spaces and flips. ...
|
| pre calc | 7/17/2006 |
Q: no it is rectangluar...but i got the answer...so thanks anywayA parcel of land has a length that is ...
A: you may already know this, but unless you wrote it wrong. the formula is (2w + 4)w = sqrt(61) 2w^2 ...
|
| pre calc | 7/14/2006 |
Q: Write y=2x^2 - 8x + 3 in the form y = a(x-h)^2 + k. Identify the vertex, axis of symmetry, ...
A: y = 2x^2 - 8x + 3 y = (2x^2 - 8x) + 3 y = 2(x^2 - 4x) + 3 y = 2(x^2 - 4x + 4 - 4) + 3 y = 2((x - ...
|
| Finite math | 7/12/2006 |
Q: Solve for x 2^(2-x) = 9^(2x+1) Thank you andrea
A: 2^(2 - x) = 9^(2x + 1) (2 - x)ln2 = (2x + 1)ln9 2ln2 - xln2 = 2xln9 + ln9 -xln2 - 2xln9 = -2ln2 + ...
|
| Solving system, by unique, no solutions, or infinite solutions | 7/11/2006 |
Q: 2x+3y=17 y=6x-21 17-9x=18y 12y=11-6x 3x-y=13 2y=6x-26
A: 2x + 3y = 17 y = 6x - 21 2x + 3y = 17 3y = -2x + 17 y = (-2/3)x + (17/3) (-2/3)x + (17/3) = 6x - ...
|
| >_< sines | 7/7/2006 |
Q: my question has to do with sines and cosines. i dont really understand them at all, so i was ...
A: tanB = opposite/adjacent go from angle B, the side opposite to that, would be side "b", the ...
|
| scalene right triangle | 7/5/2006 |
Q: How do you calculate the angles of a scalene right triangle? The sides are 27", 33.5", 43" with the ...
A: sqrt(1851.25) = (1/2)sqrt(7405) sin(x) = opposite/hypothenuse sinA = 27/((1/2)sqrt(7405)) sinA = ...
|
| Salary Calculation | 7/4/2006 |
Q: Attempting to create a formula for calculating a salary based on a few variables and a few constant ...
A: A = B + C A = (RH) + (OT) A = (40h) + (5 * 1.5h) 807.69 = 40h + 7.5h 47.5h = 807.69 h = 17.004 T = ...
|
| polynomial functions | 7/3/2006 |
Q: Find the three roots of the equation x^3=1
A: x^3 = 1 x^3 - 1 = 0 (x - 1)(x^2 + x + 1) x^2 + x + 1 x = (-b ± sqrt(b^2 - 4ac))/2a x = (-1 ± ...
|
| Algebra | 7/3/2006 |
Q: Hey there I was working on some quantitative analysis problems and I seem to have a gap in my ...
A: y = (x + 2)/(x - 3) y = (x + 2)/(x - 3) multiply both sides by (x - 3) xy - 3y = x + 2 add 3y ...
|
| rational equations | 6/30/2006 |
Q: Find A,B,and C such that : (x-1)/(x+1)(x-2)^2=A/(x+1)+ B/(x-2)+C/(x-2)^2
A: ((x - 1)/((x + 1)(x - 2)^2))) = (A/(x + 1)) + (B/(x - 2)) + (C/(x - 2))^2 becomes x - 1 = A(x - ...
|
| Complete the Square | 6/22/2006 |
Q: x^2 +6 sqrt2x +y^2-2 sqrt5y=-3
A: so by this do you mean x^2 + 6sqrt(2x) + y^2 - 2sqrt(5y) = -3 I will assume you actually meant ...
|
| simplify algebraic expressions | 6/19/2006 |
Q: simplify (3a4-2a2+5a-10)-(2a4+4a2+5a-2)
A: (3a^4 - 2a^2 + 5a - 10) - (2a^4 + 4a^2 + 5a - 2) 3a^4 - 2a^2 + 5a - 10 - 2a^4 - 4a^2 - 5a + 2 (3 - ...
|
| inductive and deductive reasoning | 6/4/2006 |
Q: Affirming the antecedent: 1. determine whether the following argument is correct. if its not ...
A: The only way to make this true is All NBA basketball players are over 5 feet tall. "Bill" Russell ...
|
| triangles | 6/4/2006 |
Q: I know the length, in inches, of one side of a right triangle. 20". How do I figure out the lenght, ...
A: a^2 + b^2 = c^2 Isosceles 20^2 + 20^2 = c^2 400 + 400 = c^2 800 = c^2 c = 20sqrt(2) inches ...
|
| sets | 5/26/2006 |
Q: how many different sets of six numbers each are possible to make from integers 1 to 45
A: If you are saying 1,2,3,4,5,6 and 2,3,4,5,6 as being 2 different sets then 46C6 = 9366819 possible ...
|
| Find the cost and numbers of animal (4 unknowns) | 5/23/2006 |
Q: I have this tought question and would need your help.The question sounds like this: Mike has bought ...
A: ax + by = 208 x + y = 20 x + y = 20 y = -x + 20 ax + b(-x + 20) = 208 ax - bx + 20b = 208 (a - b)x ...
|
| trig. | 5/20/2006 |
Q: i have aFrom a point 50 meters from the bottom of a radio tower along level ground, the angle of ...
A: since you are trying to find the height of the tower and not the distance from the top of the tower ...
|
| trigonometry | 5/19/2006 |
Q: i need help on thisWhile fishing on a local lake, you see a fish below water at a 25 degree angle ...
A: cos(25°) = 20/x x = 20/(cos(25°)) x = 22 The fish is 22ft away from the boat. Heres how you do it ...
|
| Exam questions | 5/19/2006 |
Q: Math * 2005-2006 Final Exam Questions * Mrs. Martinez 1. When x does not repeat 2. Which of ...
A: I will answer as many as i can. 3.) Which abbreviation is used for slope? ANS : m 5.) What is ...
|
| quadratic functions | 5/18/2006 |
Q: i have a question about the following expression y=2(x)squared -17(x)-19 after the formula x=b ...
A: y = 2x^2 - 17x - 19 If you are talking about x = (-b ± sqrt(b^2 - 4ac))/2a x = (-(-17) ± ...
|
| Trig | 5/17/2006 |
Q: My book says 10 for the clock problem?1) What are the possible areas of a triangle with sides 6 and ...
A: if you are not including 12am or 12pm 1:05 2:10 3:15 4:20 5:35 6:30 7:35 8:40 9:45 10:50 11:55 ...
|
| Trig | 5/17/2006 |
Q: 1) What are the possible areas of a triangle with sides 6 and 7 ? 2)Between 12 am and 12 pm how ...
A: first the first question, i recommend going to answers.yahoo.com 2.)If by this you mean cross ...
|
| Re: xy coordinate plane | 5/15/2006 |
Q: The original question posed is correct; the function is indeed x=(y^2)-4. However, the error lies ...
A: Exactly what do you mean by "Amend your answer" and how do i do that. I already told you i wasn't ...
|
| Re: xy coordinate plane | 5/14/2006 |
Q: I'm writing about an old question you answered on 5/16/05; the answer you provided is incorrect. ...
A: Because your problem is in x = form instead of y = form, i am not 100 certain if the slope is ...
|
| Need Help as soon as possible | 5/9/2006 |
Q: I need to solve these three in terms of x Cos((5pi)/2)+x=-Sin(x) Cos(x)> -radical(3)/2 Sin(2x)<0
A: cos((5pi)/2) + x = -sin(x) (5pi/2) = 450° or 90° cos(90°) = 0 x = -sin(x) x = 0 Check this out, ...
|
| please can i get help with Algebra and do it step by step!?! | 5/7/2006 |
Q: 1.For each equation, state the values of a, b and c, that would be used in the quadratic formula. ...
A: Assuming nothing was typed wrong. 1.) A.) x^2 - 7x = 2 x^2 - 7x - 2 = 0 a = 1 b = -7 c = -2 x = ...
|
| Pre-Cal | 5/5/2006 |
Q: Give Max number of zeros the poly function may have use Descarte's Rule of Signs ...
A: Give Max number of zeros the poly function may have use Descarte's Rule of Signs ...
|
| Pre-Cal | 5/4/2006 |
Q: Solve the equation............ 3^x=81 2^(8-2x)=4 2^(1+2x)=32
A: 3^x = 81 3^x = 3^4 x = 4 Another way, is to do it like this 3^x = 81 log(3)81 = x x = ...
|
| algebra | 5/1/2006 |
Q: cud u show me the steps in the question please the area of a rectangle is 270 cm^2 if th shorter ...
A: A = LW LW = 270 (L + 4)(W - 2) = 16 LW = 270 W = (270/L) (L + 4)((270/L) - 2) = 16 270 - 2L + ...
|
| Question | 4/27/2006 |
Q: How can i perform the following calculations in binary arithmetic: a) 1101101 + 1011110 b) 1001101 ...
A: Here is what i did. I went to Start, Accessories, Calculator. And i can do the math with that. But ...
|
| equation help | 4/25/2006 |
Q: the expansion of steel=C*L*(T2-T1) where C=11.3*10^(6)/degreesC L=37m, T1=37 DegC, T2= -4 DegC not ...
A: Let me get this straight EOS = CL(T2 - T1) C = 11.3 * 10^6°C L = 37m T1 = 37°C T2 = -4°C EOS = ...
|
| College Algebra- Math questions | 4/22/2006 |
Q: 1) Use the compound interest models A=P(1+r/n)^nt and A=Pe^rt to answer this question. Suppose ...
A: 1) Use the compound interest models A=P(1+r/n)^nt and A=Pe^rt to answer this question. Suppose you ...
|
| Math | 4/22/2006 |
Q: 1. Answer the following for f(x)=3x^4-10x^3-5x^2-10x-8=0 1a. How many zeros can this function ...
A: 1.) Answer the following for f(x)=3x^4-10x^3-5x^2-10x-8 1a. How many zeros can this function have? ...
|
| College Algebra | 4/22/2006 |
Q: 1. Find each of the following for f(x)=3(x+4)^2-30. (No decimal approximations, find exact values). ...
A: 1.) Find each of the following for f(x)=3(x+4)^2-30. (No decimal approximations, find exact values). ...
|
| Seven 1-minute questions | 4/20/2006 |
Q: or Dr. Sherman, I have seven short math problems for which I have the answer but not a solid ...
A: 1.) If y = (x + 4)/(x - 1), which of the following represents x? Sorry, i don't quite understand ...
|
| Math- exam questions | 4/19/2006 |
Q: 1) Sketch and label appropriately the graph of a function f using the following properties: f is ...
A: For help on 1 and 2, i recommend asking for help at answers.yahoo.com ...
|
| Joint Variation Problem | 4/18/2006 |
Q: 1. Suppose y varies jointly as x and z. If y=10 when x=2 and z=4, find y when x=4 and z=3. So far ...
A: 1.) Suppose y varies jointly as x and z. If y=10 when x=2 and z=4, find y when x=4 and z=3. z = ...
|
| Logarithmic expression- College Algebra | 4/16/2006 |
Q: Expand and evaluate logarithmic expressions where possible: log8 3squart root x^5/ 64y^2 ...
A: by this do you mean log(8)((3sqrt(x^5))/(64y^2)) log(8)(3sqrt(x^5)) - log(8)(64y^2) ...
|
| College Algebra | 4/15/2006 |
Q: I have a few questions on some math problems for a test review. Directions: Solve for x. State ...
A: If you want exact values, then use your computers calculator. 1.) (x + 3)^2 = 5 x + 3 = sqrt(5) x ...
|
| 110 degree angle, 2 sides, find hypotenuse | 4/15/2006 |
Q: I understand the simple method of a right angle (90 degrees)to find the hypotenuse, A squared + B ...
A: As i made sure with answers.yahoo.com. Whenever you are having to find the hypothenuse of a ...
|
| 110 degree angle, 2 sides, find hypotenuse | 4/12/2006 |
Q: I understand the simple method of a right angle (90 degrees)to find the hypotenuse, A squared + B ...
A: c^2 = a^2 + b^2 - 2ab cos(C) c^2 = 4^2 + 2^2 - 2(4)(2)cos(110) c^2 = 16 + 4 - 16cos(110) c^2 = 20 - ...
|
| Systems of Equations and Inequalities- College Algebra | 4/10/2006 |
Q: Question # 1: One Kung Pao chicken and two Big Macs provide 2620 calories. Two Kung Pao chickens ...
A: 1.) x = Kung Pao Chicken y = Big Macs x + 2y = 2620 2x + y = 3740 Multiply the top by -2 -2x - ...
|
| College Algebra | 4/9/2006 |
Q: A few more questions that I need assistance with. Directions: India is currently one of the ...
A: A = 574e^.026t 1.) 2732 = 574e^(.026t) (2732/574) = e^(.026t) ln(2732/574) = .026t t = ...
|
| General equation of a circle | 4/7/2006 |
Q: I've been out of school for 4 months do to an injury, and I've been basically teaching myself ...
A: x^2 + y^2 + ax + by + c = 0 x^2 + ax + y^2 + by + c = 0 (x^2 + ax) + (y^2 + by) + c = 0 (x^2 + ax ...
|
| Pre-Calculus | 4/6/2006 |
Q: Find all the roots of x^4-6x^2-27 and Find all the roots of x^4-5x^2-36
A: x^4 - 6x^2 - 27 (x^2 - 9)(x^2 + 3) (x - 3)(x + 3)(x^2 + 3) Real Roots = ±3 Imaginary Roots = ±i * ...
|
| Trigonometry | 3/29/2006 |
Q: I have two. I hope that's okay. The section is solving trig equations. (1) 2sin(30 + x)=3cosx ...
A: Unless i am doing something wrong, i can't find a match to either. When its working, go to ...
|
| Math problems | 3/25/2006 |
Q: 1) What is the vertex and x-intercepts for the parabola whose equation is f(x)=x^2+4x+1? State ...
A: 1) What is the vertex and x-intercepts for the parabola whose equation is f(x)=x^2+4x+1? State exact ...
|
| Averages | 3/20/2006 |
Q: I want to thank you for the reply, but I think that you reversed the process. The 2/3 and 1/3 are ...
A: same process (x * 5) + (y * 2) = 4 5x + 2y = 4 2y = -5x + 4 y = (-5/2)x + 2 Any number between ...
|
| Averages | 3/19/2006 |
Q: The simple average for 5 and 2 is 3.5, (1/2 X 5) + (1/2 X 2) = 5/2 + 2/2 = 7/2 = 3.5. However, if 4 ...
A: ((2/3)x) + ((1/3)y) = 4 ((2x)/3) + (y/3) = 4 multiply everything by 3 2x + y = 12 y = -2x + 12 ...
|
| Math | 3/12/2006 |
Q: Can you please help me with the following questions. Solve each equation using the method of your ...
A: 1) 13x^2 = 7x 13x^2 - 7x = 0 x(13x - 7) = 0 x = 0 or (7/13) --------------------------- 2) w^2 ...
|
| math | 3/6/2006 |
Q: y-x x ______ + ______ x+y x-y _______________________ 3 2 1-x ...
A: (((y - x)/(x + y)) + (x/(x - y)))/((1 - x)((3/(y - x)) - (2/(x + y))) (((-x + y)/(x + y)) + (x/(x - ...
|
| mental computational question | 3/3/2006 |
Q: a truck can hold 1000 (one thousand) litre of petrol . it want to transfer as many as it can to a ...
A: if i understand you correctly. if it travels 3000 km and at each km it loses 1L, then that would ...
|
| precalc.. HELP! | 3/2/2006 |
Q: i have a question on half angle identities: sin (pie)/12 cot 5(pie)/12 tan (pie)/8 and also ...
A: You can find this out at www.quickmath.com, click on Solve under Equations, then type in x = and ...
|
| algebra | 2/28/2006 |
Q: I have a couple of questions for you! 1)Find the equation of the inverse of f(x)=8x - 3 / 3. 2)Write ...
A: 1.) f(x) = (8x - 3)/3 y = (8x - 3)/3 x = (8y - 3)/3 3x = 8y - 3 3x + 3 = 8y y = (3x + 3)/8 f^-1(x) = ...
|
| Find Length of two sides of right triangle | 2/27/2006 |
Q: Good morning, I have a right triangle. I know the angles of all three sides The right angle is on ...
A: Using 70° Tan(70°) = x/8 x = 8Tan(70°) x = about 22 inches Cos(70°) = 8/y y = 8/(cos(70°)) y = ...
|
| Word problem +1 | 2/25/2006 |
Q: Could you please help me with the following problems: Word Problem: As the use of the Internet ...
A: 1.) N(x) = .2x^2 - 1.2x + 2 or N(x) = .2(x^2 - 6x + 10) N(10) = .2(10^2 - 6(10) + 10) N(10) = ...
|
| probability | 2/22/2006 |
Q: 10 cards were chosen out of a 52 card pack. What is the probability that there are 4 aces among ...
A: ((1/52)+(1/51)+(1/50)+(1/49)+(1/48)+(1/47)+(1/46)+(1/45)+(1/44)+(1/43)) * ...
|
| Word Problem | 2/19/2006 |
Q: You inherit $18,750 with the stipulation that for the first year the money must be placed in two ...
A: .10x + .12y = 2117 x + y = 18750 10x + 12y = 211700 x + y = 18750 Multiply the bottom by -10 10x ...
|
| Critical Thinking Problem | 2/18/2006 |
Q: Which one of the following is true? a) If the coordinates of a point satisfy the inequality xy > ...
A: a.) xy > 0 x and y can both be positive or negative, so the answer is Quadrant I and III, so this ...
|
| Euler's mps | 2/18/2006 |
Q: What is meant by mps? I realize you're not into physics, etc., but maybe you can help me here. ...
A: About all i can find on this subject. When it states Euler's mps, i guess its saying Euler's owner. ...
|
| Areas | 2/14/2006 |
Q: Goodday, Please how am i supposed to find the area below the curve y = 1/x from x = 0 to x = 2. ...
A: using http://numbers.computation.free.fr/Constants/Log2/log2.html distance : area 1 : log(2) .5 : ...
|
| Precalculus | 2/8/2006 |
Q: How can I simplify the expression: (sec x + csc x) / (1 + tan x)
A: (secx + cscx)/(1 + tanx) ((1/cosx) + (1/sinx))/(1 + tanx) Multiply the top by (cosx)(sinx) ((sinx ...
|
| Alg. 2 | 2/4/2006 |
Q: 1.Identify the solutions to the equation x^2=4x-1 when you solve using the quadratic formula? ...
A: 1.) x^2 = 4x - 1 x^2 - 4x + 1 = 0 x = (-b ± sqrt(b^2 - 4ac))/2a x = (-(-4) ± sqrt((-4)^2 - ...
|
| Induction and Recursion | 2/3/2006 |
Q: I'm working on a proof for mathematical induction that the sum of the first n numbers is equal to ...
A: i believe what you are wanting is n E k = (n(n + 1))/2 k = 1 ...
|
| Geometry/Algebra I | 2/2/2006 |
Q: "Triangle RES has vertices R(0,0), E (4,-6) and S(8,4). Find the equation of the perpendicular ...
A: Midpoint of RE (0,0) and (4,-6) Mx = (4 + 0)/2 = 4/2 = 2 My = (-6 + 0)/2 = -6/2 = -3 Midpoint = ...
|
| Alegebra Two Questions | 2/2/2006 |
Q: 1.Which equations represent one of the steps of solving 6x^2-6x-12=0 by factoring ? A)6x+4=0 or ...
A: 1.) 6x^2 - 6x - 12 = 0 6(x^2 - x - 2) = 0 6(x - 2)(x + 1) = 0 ANS : D.) x - 2 = 0 or x + 1 = 0 ...
|
| Alg. 2 | 2/2/2006 |
Q: 1.Which term is the linear termin the equation y=2x^2-3x+5 ? 2.Identify the vertex of the parabola ...
A: 1.) I'm not certain what you mean by linear term, since i can't ever remember having to know what it ...
|
| Inequality proving | 1/29/2006 |
Q: Prove the following if a,b,c,d >0: 1a) a/b + b/c + c/a >or= 3 b) a/b + b/c + c/d + d/a >or= 4 thank ...
A: Lets just use 1,2,3,4 a = 1 b = 2 c = 3 d = 4 1.) a.) (a/b) + (b/c) + (c/a) >= 3 Multiply ...
|
| % of oil to seed blend | 1/26/2006 |
Q: i need to know how much seed i would need if i have seed with 86% oil and some with 20% oil. how ...
A: first of all, how much 86% oil seeds and 20% oil seeds do you have. I need to know how much seed ...
|
| Word problem-need help! | 1/24/2006 |
Q: Sherman- First of all thanks so much for answering my question- that was really fast!!!! However ...
A: 1.) A = A0e^(-.24755t) 20 = 50e^(-.24755t) (2/5) = e^(-.24755t) inverse e both sides ln(2/5) = ...
|
| motion in a straight line | 1/24/2006 |
Q: Recently I have been requested to teach calculus and its applications to older students . I am ...
A: Tell me this, is it velocity or acceleration that is in the form of y = (1/2)at^2 + x0. If its ...
|
| motion in a straight line | 1/23/2006 |
Q: Recently I have been requested to teach calculus and its applications to older students . I am ...
A: Physical Motion 1.) When something that is thrown up at a 90 degree angle has 3 moments that it is ...
|
| Domain, vertical asymptote, and the x-intercept | 1/22/2006 |
Q: Can you please help me with this question. Find the domain, vertical asymptote, and the x-intercept ...
A: f(x) = log(4)(5 - x) f(x) = (log(5 - x))/(log(4)) in log(x), "x" can't be 0 and anything above 5 ...
|
| logic | 1/19/2006 |
Q: A man has drowned in the middle of a lake, which is almost twenty feet deep, and is lying at the ...
A: Assuming that he didn't walk to the bottom with weights on his feet to keep him from floating to the ...
|
| quotient rule and composite rule | 1/1/2006 |
Q: my work out (a),use quotient rule to differentiate the function f(x)=1+2x/1-2x let ...
A: Sorry it took so long, i had to get some help to make sure i understood your question a little ...
|
| Chaos theory | 12/20/2005 |
Q: Please can you tell me what is chaos theory,and how is the subject used in the stock markets. is ...
A: chaos theory chaos theory, in mathematics, physics, and other fields, a set of ideas that attempts ...
|
| s(t)=1/2at^2+VoT+So | 12/19/2005 |
Q: Suppose a ball is dropped from a window 35 meters above the ground. a. Find the height of the ...
A: s(t) = (1/2)at^2 + VoT + So In this case a = -9.8 So = 35 VoT = 0 s(t) = (1/2)(-9.8)t^2 + 35 s(t) ...
|
| pre calcus | 12/18/2005 |
Q: 1-prove the identity Tan square=csc square/csc square-1 than -1 2- find the inverse x+1/2-3x ...
A: 1.) when you have csc square/(csc square - 1) you need to have a degrees of some sort, the letter ...
|
| Sukokos | 12/16/2005 |
Q: I am wondering in the Sudoko game ...a grid of 9X9 where the numerals 1-9 are used once in each row, ...
A: Try this website for help http://www.sudukogame.com/ i have never played the game, so i can't ...
|
| calc | 12/11/2005 |
Q: Please, if u can, can u try to e-mail me ASAP, and show me how u got the answer 1) evaluate ...
A: Sorry i will have to ask someone for help, since most of the problems i have never done before or ...
|
| parabolas | 12/5/2005 |
Q: Why is the axis located at -2a? Why the 2? Someone once told me it's related to the formula for ...
A: ax^2 + bx + c = 0 ax^2 + bx = -c x^2 + (b/a)x = (-c/a) x^2 + (b/a)x + ((b/a)/2)^2 = (-c/a) + ...
|
| Trigonometric Function................. | 11/30/2005 |
Q: Prove that the following: sin2A/sinA – cos2A/sinA - cos2A/cosA = secA and cos4A = 8cos^4A - 8cos^2A ...
A: By your first problem, did you mean ((sin(2A))/sinA) - ((cos(2A))/sinA) - ((cos(2A))/cosA) = secA ...
|
| math | 11/28/2005 |
Q: 1. I need to apply weed killer to my lawn. The bottle says to mix 3oz. with every 2gal. of water. ...
A: 1.) (3oz)/(2gal) = x/(5gal) cross multiply 2x = 15 x = 7.5oz ---------------------------- 2.) (3/5 ...
|
| volume | 11/27/2005 |
Q: Sherman could you tell me the volume of a soup can in cubic inches. It can be any cylinder soup can ...
A: V = Pi * r^2 * h Let me explain how the formula came to be Take of a cylinder as a rectangle to ...
|
| math questions | 11/27/2005 |
Q: could you please help me with these, 1. Distinguish between a relation and a function. State a ...
A: Here are the ones i can solve or understand. 1.) A relation is a set of inputs and outputs, often ...
|
| math | 11/25/2005 |
Q: 1.what is the arithmatic mean and geometric mean? 2.why 1/0 is undefine?
A: Arithmetic Mean (a1 + a2 + a3 + ... aN)/N Geometric Mean (a1 * a2 * a3 * ... aN)^(1/N) Info found ...
|
| Math | 11/21/2005 |
Q: 1. How can I rewrite R=s+2t if s is three times greater than t. 2. The distance h a body will ...
A: 1.) R = s + 2t if "s" is 3 times greater than t, then R = 3t + 2t R = 5t ------------------------- ...
|
| Please help! It's super hard! | 11/17/2005 |
Q: A large birthday cake was baked to celebrate the 6th birthday of Mimi. It was a round cake, made of ...
A: I hope you understand what i am about to tell you. Keep in mind there are 2 layers The 2 formulas ...
|
| l'hopital's rule | 11/16/2005 |
Q: use l'hopital's rule to find the limits. 1) lim x-->0 (1/x^2)^x 2) lim x-->infinity (ln 2x - ln ...
A: Sorry it took so long, but first i needed to understand how to work it, so i had to ask someone else ...
|
| trig | 11/12/2005 |
Q: Express the following identities in terms of one trigonomic function. 1. (secx+1 / tanx) + (tanx / ...
A: 1.) ((secx + 1)/tanx) + (tanx/(secx + 1)) Multiply everything by (tanx)(secx + 1) ((secx + 1)^2 + ...
|
| complexity theory | 11/12/2005 |
Q: Mr Sherman , I have come to know that all mordern encryption algorithms deal with mathematical area ...
A: The aim of algorithm design and complexity theory in parallel/distributed computing is to study ...
|
| word problems | 11/11/2005 |
Q: Mr. Reigle observes that the angle of elevation of the top of a building is 41degrees35minutes. ...
A: It sometimes helps to draw it out. Here are the values used x = distance from the building y = ...
|
| math | 11/9/2005 |
Q: there are 174 hores stabled for the winter at assinaboine down. the horses are either stallions, ...
A: s = stallions c = colts m = mares f = fillies m + c + f + s = 174 m = 2s c = (1/2)s f = (2/3)m m ...
|
| applications on derivatives | 11/7/2005 |
Q: had galileo dropped a cannonball from the Tower of Pisa, 179 ft. above the ground, the ball's height ...
A: 1.) s = 179 - 16t^2 s = -16t^2 s = -32t^(2 - 1) s = -32t Velocity = -32t s = 179 - 16t^2, which ...
|
| applications on derivatives | 11/7/2005 |
Q: At time t, the position of a body moving along the s-axis is s=t^3-6t^2+9t m. 1) find the body's ...
A: Sorry it is taking me so long, but before i can start helping you, i need to first get some help ...
|
| Physics | 11/6/2005 |
Q: A ball of mass 0.50kg is swung in a circule of radius 2.0m with a period of 1.5s (as in figure #028) ...
A: Assuming the radius remains the same and the period remains constant. a.) v = 2pi(r/T) v = ...
|
| polynomial functions... | 11/5/2005 |
Q: I am having trouble with the following problem and was hoping you could spell it out for me. Algebra ...
A: p(x) = 3x^3 - 29x^2 + 92x + 34 if 5 + 3i is a factor, then 5 - 3i is also a factor (x + (5 + ...
|
| Normal Curve Equivalents | 11/4/2005 |
Q: What is Normal Curve Equivalents? Thought you might know.. Thanks in advance. Kate
A: Here are some sites Normal Curve Equivalents (NCE) Normal curve equivalents are a comparatively ...
|
| The question is as follows:
For... | 11/4/2005 |
Q: The question is as follows: For this problem you have a number of metal balls whick all look and ...
A: I will number the balls form 1-10 2 balls - 1 : 2 = one try 3 balls - 1 : 2 = 1 try, since if 1 ...
|
| pre-calculus | 11/3/2005 |
Q: This is a pre- calculus question. It is from the textbook "Advanced Mathamatical Concepts" ...
A: a(n) = (a1)r^(n - 1) so there is less confusion, lets just say a(n) = xr^(n - 1) a1 + a2 + a3 + a4 ...
|
| I am working on proofs. I... | 11/1/2005 |
Q: I am working on proofs. I need to prove that when A and B are sets, A union B= (A-B)union (B-A) ...
A: A U B = (A - B) U (B - A) U (A intersect B) This shows you about what to do ...
|
| Question | 10/31/2005 |
Q: i was wondering if you could help me in the right direction with this question x ^2.5 = 15121.07 ...
A: x^(2.5) = 15121.07 log(x)15121.07 = 2.5 you can also write this as (log(15121.07))/(log(x)) = 2.5 ...
|
| derivatives involving general exponentials | 10/29/2005 |
Q: find the derivative of y with respect to the given independent variable. 1) y=7^(sec(theta))ln7 2) ...
A: 1.) y = 7^(sec(theta)ln7) y = (7^(sec(theta)ln7))(ln7) This is probably wrong, since as you are ...
|
| derivatives involving general exponentials | 10/29/2005 |
Q: find the derivative of y with respect to the given independent variable. 1) y=2^x 2) y=x^pi
A: on these, i will use y' = (b^x)(ln(b)) 1.) y = 2^x y' = (2^x)(ln(2)) ...
|
| Enlarging rectangles | 10/25/2005 |
Q: How would the side length of the enlarged rectangle compare to the side length of the original ...
A: Are there measurements. Here is what i can give you. Triangle Perimeters a + b + c 2a + b 3a Area ...
|
| derivatives | 10/22/2005 |
Q: find the derivatives of the functions. 1) h(x)=xtan(2sqrt(x))+7 2) f(x)=((sin x)/(1+cos x))^2
A: 1.) h(x) = xtan(2sqrt(x)) + 7 h(x) = xtan(2sqrt(x)) h(x) = xtan(2sqrt(x)) h(x) = x * tan(2sqrt(x)) ...
|
| Trig | 10/18/2005 |
Q: 'from first principles determine values for the follwing trigonmetric rations in surd form without a ...
A: cos(A - B) = cos(A)cos(B) + sin(A)sin(B) 52.5 = (105/2) = (180-75)/2 = (180/2)-(75/2) = 90 - (75/2) ...
|
| Trig | 10/17/2005 |
Q: If Cos t= -o.8367, find sin t and tan t when 3.2<t<6.1. Use sinsquared t + cos squared t= 1 and tan ...
A: cos(t) = -.8367 (sin(t))^2 + (cos(t))^2 = 1 tan(t) = (sin(t))/(cos(t)) (sin(t))^2 + (cos(t))^2 = 1 ...
|
| solving system of linear equations | 10/11/2005 |
Q: Find/solve following system of linear equations, 3y_1 + 2y_2 +y_4 = 6 5y_1 - 2y_2 +2y_4 = 5 ...
A: I hope you don't mind, but to make it easier for me to work, i am going to do it this way x = y_1 y ...
|
| here are questions, i hope its not too many | 10/7/2005 |
Q: State whether the expression is a polynomial by writing yes or no. If it is, classify it as ...
A: If by these you mean 1.) (-1/3)x^3 Yes, monomial 2.) 7/(y + z) = 7(y + z)^(-1) No 3.) 3 + 7x - ...
|
| derivatives | 10/7/2005 |
Q: find the derivatives of all orders of the function. 1)y= (x^4/2) - (3/2 x^2) - x
A: If you are saying for me to find the nth derivative, then y = (1/2)x^4 - (3/2)x^2 - x y' = ...
|
| derivatives of functions | 10/7/2005 |
Q: find the first and second derivatives. 1) y=x^2+x+8 2) y=(4x^3/3) - 4
A: 1.) y = x^2 + x + 8 y' = (x^2)' + (x)' + 8 Derivatives of Constants is 0 y' = (x^2)' + (x)' The ...
|
| math problem | 10/6/2005 |
Q: Could you recommend me to someone else that can help me out solving it by inverse matrix? cuz i want ...
A: www.quickmath.com maybe able to help, but i think at that site it has to be a square matrix. Since ...
|
| to the nth power | 10/6/2005 |
Q: ------------------------- Thanks again for the fast follow-up. I fear you are way over my head with ...
A: most problems when you have Pn = Po(1 + r)^n, you can just divide both sides by Po, then nthrt both ...
|
| to the nth power | 10/6/2005 |
Q: some confident feelings about this. My question is still unanswered. What formula do I use to ...
A: If you are asking for me to solve for "n" then here goes. Pn = Po(1 + r)^n (1 + r)^n = (Pn/Po) ...
|
| to the nth power | 10/5/2005 |
Q: I am studying for the Series 66 securities exam and one of the formulas in the text book shows ...
A: if by this you mean Pn = Po(1 + r)ª, but instead of ª you have an "n". This is what is known as ...
|
| math problem | 10/3/2005 |
Q: could you please solve the following problem for me ? An electronics firm produces three products: ...
A: 5x + 6y + 2z = 20000 4x + 3y + 4z = 22000 6x + 4y + 5z = 30000 This is how i am going to do it, ...
|
| Proportions in the Right Triangle | 10/3/2005 |
Q: I received a question on my test and I did not know how to approach the question. My teacher would ...
A: Once i knew BC and AC, i just use the pythagorean thereom, which gave me 50 miles. when you create ...
|
| dividing a circle | 10/1/2005 |
Q: I need to draw a cogwheel (needs to be accurate). I think that involves dividing a circle into equal ...
A: You may already know this, but a cogwheel is the same as the gears on a bike, where the chain is ...
|
| limits | 9/30/2005 |
Q: 1) lim x-->0 (x^2)/(1-cos x) 2) lim x-->0+ cos (1/x)
A: 1.) (x^2)/(1 - cos(x)) (x^2(1 + cos(x))/((1 + cos(x))(1 - cos(x))) (x^2(1 + cos(x)))/(1 - cos(x) + ...
|
| small conversion question! | 9/27/2005 |
Q: My name is Assaf and I have a question about conversion: I have to convert inches into: Yards, feet ...
A: 134 inches 1 yard = 36 inches 134/36 = 3.7222222222222 1 yard = 3 feet since we already found ...
|
| word problem | 9/26/2005 |
Q: i am stumped by the following problem. a man has 160 feet of fence, and a barn 100 feet long. he ...
A: 1.) xy or lenght * width Since you said what gives you maximum area, i just put xy = max, because i ...
|
| word problem | 9/25/2005 |
Q: i am stumped by the following problem. a man has 160 feet of fence, and a barn 100 feet long. he ...
A: x + 2y = 160 xy = max x + 2y = 160 2y = -x + 160 y = (-1/2)x + 80 ((-1/2)x + 80)x = max (-1/2)x^2 ...
|
| limits | 9/25/2005 |
Q: find the limit of the function a)as x--> infinity and b) x-->(-)infinity. 1) g(x)=1/(2 + (1/x)) 2) ...
A: 1.) g(x) = 1/(2 + (1/x)) g(x) = 1/((2x + 1)/x) g(x) = (1/1)/((2x + 1)/x) g(x) = (1/1)*(x/(2x + 1)) ...
|
| Recurrence relation | 9/24/2005 |
Q: I think Advanced Math is the right place to put this... it's certainly advanced. I hope you can help ...
A: a(n) = (1/2)a(n - 1) + (1/2)a(n - 2) + n a(n) = (a/2)((n - 1) + (n - 2)) + n a(n) = (a/2)(n - 1 + n ...
|
| Function Graph and Initial value problem | 9/22/2005 |
Q: I got there in the end. I have 2 more questions that I'm stumbling over and would appreciate your ...
A: Q1.) I hope this is what you are wanting. y = ((1 - x)(x - 5))/x 1 <= x <= 5 for a graph, so that ...
|
| functions | 9/21/2005 |
Q: state whether the equation is even, odd, or neither. 1) f(x)=x^2 + x 2) f(x)=2x-4 3) f(x)= sqrt ...
A: Even usually follows this rule (x,y) and (-x,y) Odd usually follows this rule (x,y) and (-x,-y) If ...
|
| Completing the Square | 9/19/2005 |
Q: The u is a point at the end of the vertical line where it meets the x axis from the diagonal line. ...
A: Are you saying that the line is (1 + t) to the right and (-12t + 6) up, which the top of the line ...
|
| Completing the Square | 9/19/2005 |
Q: Sorry about all the confusion here and I appreciate your time. If I can prob best explain the ...
A: a. Determine an expression for the area A in terms of u b. Find the completed square form of the ...
|
| Completing the Square | 9/18/2005 |
Q: Just to make doubly sure that I do indeed have the right expression I worked it out from the ...
A: y ¦ ¦ b ¦ | | | | | | A | | | | | ...
|
| Completing the Square | 9/18/2005 |
Q: I need to complete the square on the following expression and hoped you could help. The expression ...
A: if you have this written right, then (1/2)u * (19.5 - u) (u/2)((39/2) - u) (39u/4) - ((u^2)/2) ...
|
| division | 9/15/2005 |
Q: If you divide an inheritance of $45,600.00 among 22 heirs, each heir will receive? my answer was ...
A: 45600/22 = 2072.727272727 since you are dealing with money, you have to round to the nearest cent. ...
|
| lcd | 9/14/2005 |
Q: the lcd for the fractions 1/3, 3/4, 5/32, and 8/9 is. If you could please help me out with this id ...
A: Here is how you find it (1/3) (3/4) or (3/(2*2)) (5/32) or (5/(2*2*2*2)) (8/9) or (8/(3*3)) so to ...
|
| radians, degrees, and circular arcs | 9/13/2005 |
Q: 1) on a circle of radius 10 m, how long is an arc that subtends a central angle of a) 4(pi)/5 ...
A: a.) s = r(theta) s = 10((4pi)/5) s = (40pi)/5 s = 8pi b.) s = r(alpha(pi/180)) s = 10((110pi)/180) ...
|
| exponential function | 9/11/2005 |
Q: assume that the graph of the exponential function f(x)=k • a^x passes through the 2 points. find the ...
A: f(x) = ka^x y = ka^x 1.5 = ka^1 6 = ka^(-1) 1.5 = ka 6 = k(1/a) 1.5 = ka 6 = (k/a) k = (1.5)/a k ...
|
| inverses | 9/11/2005 |
Q: find f^-1 and verify that (f o f^-1)(x)= (f^-1 o f)(x)=x 1) f(x)= 1/x^2, x > 0 2) f(x)= 2x+1/x+3
A: 1.) f(x) = 1/(x^2) y = 1/(x^2) x = 1/(y^2) y^2 = 1/x y = sqrt(1/x) ANS : f(x)' = sqrt(1/x) Proofs ...
|
| college algebra | 9/11/2005 |
Q: use the equation of f shown to determine the value of x such that f(x)=9 ...
A: f(x) = 9 f(x) = (7x + 60)^3 so 9 = (7x + 60)^3 cbrt both sides cbrt(9) = 7x + 60 subtract 60 ...
|
| inverses | 9/10/2005 |
Q: find f^-1 and verify that (f o f^-1)(x)= (f^-1 o f)(x)=x 1) f(x)=x^2, x < or equal to 0. 2) f(x)= ...
A: if you are saying (f(f(x)'))) = (f(x)'(f(x))) also (f(f(x)'))) = x f(x)' means the inverse of f(x) ...
|
| solving equations for exponents | 9/10/2005 |
Q: solve the equation algebraically. 1) (1.045)^t=2 2) e^x + e^-x = 3
A: 1.) b^y = x means log(b)x = y (1.045)^t = 2 log(1.045)2 = t t = (log(2))/(log(1.045)) t = 15.7473 ...
|
| scientific notations | 9/8/2005 |
Q: what is in parenthesis 6 times 10 to the second power end parenthesis times parenthesis 0 point 25 ...
A: (6 * 10^2)(0.25 * 10^3) (6 * .25) * 10^(2 + 3) 1.5 * 10^5 this works because everything is being ...
|
| composites of functions | 9/7/2005 |
Q: if f(x)= x+5 and g(x)= x^2-3, find the following: 1) f(g(0)) 2) f(f(-5)) 3) g(g(x))
A: Let me know if you got my answer, because i accidentally clicked Sorry i couldn't answer the ...
|
| composites of functions | 9/7/2005 |
Q: if u(x)=4x-5, v(x)=x^2, and f(x)=1/x, find formulas for the following: 1) u(v(f(x))) 2) v(u(f(x))) ...
A: u(x) = 4x - 5 v(x) = x^2 f(x) = (1/x) 1.) u(v(f(x))) f(x) = (1/x) v(1/x) = (1/x)^2 = (1/(x^2)) ...
|
| finding formulas fur functions | 9/7/2005 |
Q: 1) express the area and perimeter of an equilateral triangle as a function of the triangle's side ...
A: 1.) P = 3x A = (x²sqrt(3))/4 ----------------------------------------------------------- If you ...
|
| Speed Of Light | 9/4/2005 |
Q: I know this question is probably easy for you so sorry to ask. If i were to travel the speed of ...
A: are you saying you traveled at the speed of light for 56 million km, then you traveled another 56 ...
|
| linear equations | 9/2/2005 |
Q: write a general linear equation for the line through the 2 points. 1) (0,0), (2,3) 2) (1,1), (2,1)
A: If you are asking for the General Form (ax + by = c) of a linear equation then 1.) m = (3 - 0)/(2 - ...
|
| mathmathical equation from an accountant | 8/30/2005 |
Q: I have never used this site before and only searched for it in desperation so apologies if I'm ...
A: If by X you mean to multiply, then the problem can be written like this a + .73b + .5c + .346d + ...
|
| calculus | 8/29/2005 |
Q: 1. the manager of a weeekend flea market knows from the past experience that if he charges x dollars ...
A: 1.) y = 200 - 4x y = -4x + 200 slope = dollars/space y-intercept = Max profit he will have before ...
|
| Texas Instruments Graphing Calculator | 8/26/2005 |
Q: I am going to be a student in grade 11. We are asked to get graphing calculator and the textbooks go ...
A: other than ebay, the only other place i know of is www.amazon.com, but they will be the same as if ...
|
| math | 8/26/2005 |
Q: !! good day!! I just want to ask what is the biggest prime number? and who's the person ...
A: On February 18, 2005, Dr. Martin Nowak from Germany, found the new largest known prime number, ...
|
| formula for problem | 8/20/2005 |
Q: I need to lay it on it's side to get it through a doorway. Once inside, the ceiling is only 83" ...
A: Here are some measurements 48" __/¯¯¯¯¯¯¯¯¯¯¯/| _/________16"/_| /___________/__| ...
|
| practice maths | 8/19/2005 |
Q: i would like to thank u for having a look at my mail i am a engineering student but i am very weak ...
A: can you give me some problems and i will let you know if i can help you with your trouble. by the ...
|
| mechanics | 8/15/2005 |
Q: 1.) An object has a mass of 120 kg on the moon. What is the force of gravity acting on the object ...
A: 1.) the moon's gravity is (1/6) of the earth's gravity F = ma F = Mass * Acceleration Am = (9.8)/6 ...
|
| algebra | 8/14/2005 |
Q: Calculate the acceleration of the Revolution roller coaster. Use a=(2x)/t^2). s=distance, and t= ...
A: so i don't get confused, you have to include the information for all your problem, for example, s = ...
|
| algebra | 8/13/2005 |
Q: Calculate the time duration of the Wild Thing. Use the formula d=rt. The variable r is rate or speed ...
A: t = d/r Using Miles t = (1183/5280)/25 t = 1183/132000 hours or 1183/88 minutes or 17745/22 seconds ...
|
| algebra | 8/13/2005 |
Q: Calculate the time duration of the Wild Thing. Use the formula d=rt. The variable r is rate or speed ...
A: Using Miles t = (48/5280)/25 t = 48/132000 t = 1/2750 hours or 6/275 minutes or 72/55 seconds t = ...
|
| algebra | 8/13/2005 |
Q: Calculate the time duration of the Revlotion. Use the formula d=rt. The variable r is rate or speed ...
A: Using Miles t = (70/5280)/45 t = 7/23760 hours or 7/396 minutes or 35/33 seconds t = .0002946 hours ...
|
| algebra | 8/13/2005 |
Q: Calculate the time duration of the Tennessee Tornado. Use the formula d=rt. The variable r is rate ...
A: t = d/r Using Miles t = (137/5280)/63 t = 137/332640 hours or 137/5544 minutes or 685/462 seconds t ...
|
| algebra | 8/13/2005 |
Q: Calculate the time duration of a roller coaster. Use the formula d=rt. The variable r is rate or ...
A: d = rt t = d/r I think you made a mistake 1 meter = 3.281 feet Using Miles t = (300/5280)/10 t = ...
|
| algebra | 8/12/2005 |
Q: Perform the indicated operation, m+1 over 10m+2m-1 over 5m.
A: by this do you mean ((m + 1)/(10m)) + ((2m - 1)/(5m)) Multiply everything by 10m ((m + 1) + 2(2m ...
|
| algebra | 8/12/2005 |
Q: Find a(base 7) for the geometric sequence with a(base 1)=27^r=1/3.
A: What do you mean by your problem. the GS formula is a(n) = a(1)r^(n - 1) but i don't see an "n" in ...
|
| algebra | 8/10/2005 |
Q: The graph of f(x)=x^2-10x+24/x+9 has which of the following..point discontinuity, vertical ...
A: f(x) = (x^2 - 10x + 24)/(x + 9) f(x) = ((x - 6)(x - 4))/(x + 9) this problem has a Vertical ...
|
| algebra | 8/5/2005 |
Q: Which quadrant is the terminal side of a 455 degree angle in?
A: 455° - 360° = 95° so this means that you have just went all the way around and now you are at 95°. ...
|
| algebra | 8/5/2005 |
Q: There is a solution to x=-(y-5)^2+7 and x=(y-5)^2+7. Is this true?
A: x = -(y - 5)^2 + 7 x = (y - 5)^2 + 7 -(y - 5)^2 + 7 = (y - 5)^2 + 7 subtract 7 from both sides ...
|
| algebra | 8/5/2005 |
Q: Solve the system, 4x^2_y^2=20 and y=4x.
A: if you meant to type 4x^2 - y^2 = 20 y = 4x 4x^2 - (4x)^2 = 20 4x^2 - 16x^2 = 20 (4 - 16)x^2 = ...
|
| algebra | 8/4/2005 |
Q: Find the exact solutions of x^2-(y-6)^2=36 and y=-x^2.
A: x^2 - (y - 6)^2 = 36 y = -x^2 x^2 - (-x^2 - 6)^2 = 36 x^2 - ((-x^2 - 6)(-x^2 - 6)) = 36 x^2 - ...
|
| algebra | 8/4/2005 |
Q: Convert -72 to radian measure.
A: radians = -72° * ((pi)/180) radians = (-72pi)/180 radians = (-2pi)/5 you might also be able to ...
|
| algebra | 8/3/2005 |
Q: Find the first five terms of a(base 1)=3, a(base n)=a(base n -1)+2(n-2), n is great than or equal to ...
A: If by this you are saying a(1) = 3 a(n) = a(base n - 1) + 2(n - 2) n >= 2 using the same rule ...
|
| algebra | 8/3/2005 |
Q: Find S(base n) for d=7, n=20 and a(base n)=136.
A: find S(n) S(n) = (n/2)(a(1) + a(n)) first we have to use a(n) = a1 + (n - 1)d 136 = a1 + (20 - ...
|
| algebra | 8/2/2005 |
Q: What function has a vertical asymptote as x=-2?
A: if -2 makes the denominator 0, then the vertical asymptote is -2, just as long as you don't get an ...
|
| algebra | 8/1/2005 |
Q: What is the point discontinuity of f(x)=x^2-64/x-8?
A: f(x) = (x^2 - 64)/(x - 8) I did this already but here is how you find it y = (x^2 - 64)/(x - 8) y ...
|
| algebra | 8/1/2005 |
Q: The following problem models an exponential growth. The population of fish in an area is modeled by ...
A: The question is FALSE. do you remember when i told you that at anytime the exponent can become ...
|
| algebra | 8/1/2005 |
Q: What is the standard deviation of the set of data {47, 61, 93, 22, 82, 22, 37} to the nearest tenth?
A: (47 + 61 + 93 + 22 + 82 + 22 + 37)/7 = 364/7 = 52 SD stands for Standard Deviation Variance = ...
|
| algebra | 7/31/2005 |
Q: Find the exact solutions of x^2-(y-12)^2=144 and y=-x^2.
A: Assuming you mean y = -(x^2), where as the negative is in front of the x^2 and not just with the ...
|
| algebra | 7/31/2005 |
Q: Find the length of the missing side if the hypotenuse is 5 square root 3 and the short side is 5.
A: c = 5sqrt(3) a = 5 If you are talking about a right triangle, then a^2 + b^2 = c^2 (5)^2 + b^2 = ...
|
| algebra | 7/31/2005 |
Q: All the question says is Evaluate P(8,2). The answers you can choose from are 38, 56, 64, 100. I am ...
A: at http://education.yahoo.com/homework_help/math_help/problem_list?id=miniprecalcgt_8_1 on #16, it ...
|
| algebra | 7/30/2005 |
Q: The graph of x^2+y^2=6x+81 is the graph of what shape?
A: x^2 + y^2 = 6x + 81 if you go to www.quickmath.com, click on Plot under Equations, and type in that ...
|
| algebra | 7/30/2005 |
Q: Write the equation in standard form y=x^2+2x-15.
A: y = x^2 + 2x - 15 This is just to let you know where the x-intercepts are in case you wanted to ...
|
| algebra | 7/28/2005 |
Q: If log(base 5)4~.8614 and log(base 5)9~1.3652 find the approximate value of log(base 5)36.
A: Here is how you should had typed it log(base 5)4 = .8614 log(base 5)9 = 1.3652 log(base 5)4 + ...
|
| algebra | 7/28/2005 |
Q: Evaluate log(base 7)7^5.
A: You should had typed this one like this log(base 7)(7^5) same as 5*log(base 7)7 and the reason ...
|
| algebra | 7/28/2005 |
Q: The graph of a logarithmic function y=3^x is a reflection of x=3^y over the line y=0. Is this true?
A: The question is FALSE. y = 3^x x = 3^y if you go to www.quickmath.com, click on PLOT under ...
|
| algebra | 7/27/2005 |
Q: Solve log down to the 3(x-4)>2.
A: if by this you mean log(base 3)(x - 4) > 2 3^2 > x - 4 9 > x - 4 x < 13 If that wasn't what you ...
|
| algebra | 7/26/2005 |
Q: The following function represents exponential decay, y=3(.5)^x. Is this true?
A: y = 3(.5)^x or y = 3 * (.5)^x here is how you can tell if a problem is exponential decay or not. If ...
|
| algebra | 7/25/2005 |
Q: Solve In (y-2) is greater than or equal to 4.
A: by the way, thats suppose to be a little L. ln(y - 2) <= 4 since this is the same thing as saying ...
|
| algebra | 7/25/2005 |
Q: Which of the functions has a vertical asymptote at x=-8? x-3/x-8, x/-4, (x+1)(x+8)/x+8, or ...
A: The last problem is the only answer. x - 3)/(x - 8) x cannot equal 8 This has a vertical asymptote ...
|
| algebra | 7/24/2005 |
Q: Write an equivalent expression for x if e^x +3=6.
A: if by this you mean (e^x) + 3 = 6, then (e^x) + 3 = 6 e^x = 3 log(e)3 = x or x = ln(3) but if by ...
|
| algebra | 7/24/2005 |
Q: Which pair of functions are not inverse functions? ...
A: g(x) = 3x + 8 h(x) = (1/3)x - 8 g(x) = 3x + 8 y = 3x + 8 x = 3y + 8 x - 8 = 3y y = (1/3)x - (8/3) ...
|
| algebra | 7/23/2005 |
Q: What is the point discontinuity of f(x)=x^2-64 over x+8?
A: f(x) = (x^2 - 64)/(x + 8) f(x) = ((x + 8)(x - 8))/(x + 8) f(x) = x - 8 even though the problem ...
|
| algebra | 7/22/2005 |
Q: Simplify m^2-4m+21 over (3m-6)(m+3) times (m-2) over (m-7).
A: (m^2 - 4m + 21)/((3m - 6)(m + 3)) * (m - 2)/(m - 7) ((m^2 - 4m + 21)(m - 2))/((3m - 6)(m + 3)(m - ...
|
| algebra | 7/21/2005 |
Q: Is it possible to multiply a 3x4 matrix and a 2x2 matrix?
A: You cannot multiply a 3x and a 2x2 matrix, and here is why. In order to be able to multiply ...
|
| Representing percentages | 7/21/2005 |
Q: How do you represent the following percentages, using to-the-power-of concept? %99.999999999999... ...
A: if you are talking about 99.99999999999%, then the answer is 9.9999 * 10^n where as "n" is an ...
|
| What kind of solutions does... | 7/12/2005 |
Q: What kind of solutions does ax^2-bx+c=0 have if b^2-4ac<0? two real solutions, two complex ...
A: If you really did mean to type ax^2 - bx + c = 0 instead of ax^2 + bx + c = 0, then i believe the ...
|
| When using Cramer's Rule to... | 7/12/2005 |
Q: When using Cramer's Rule to solve the system of equations containing 5x-y=5, -3x+y=-9 the ...
A: 5x - y = 5 -3x + y = -9 |5,-1| |-3,1| D = ad - bc D = (5 * 1) - (-1 * -3) D = 5 - 3 D = 2 x = ...
|
| When using Cramer's Rule to... | 7/12/2005 |
Q: When using Cramer's Rule to solve the system of equations containing 2x-y=1, -4x+3y=0 the numerator ...
A: 2x - y = 1 -4x + 3y = 0 |2,-1| |-4,3| D = ad - bc D = (2 * 3) - (-1 * -4) D = 6 - 4 D = 2 x = ...
|
| Write a function rule for... | 7/11/2005 |
Q: Write a function rule for the table. Sandwhiches 1 2 3 4 Cost ...
A: (1,2.05), (1,4.10), (3,6.15), and (4,8.20) Using this formula to get the slope m = (y2 - y1)/(x2 - ...
|
| Which of the following is... | 7/10/2005 |
Q: Which of the following is a relation but not a function? {(-10,1), (1,8), (-4, -2)} ....{(-4,1), ...
A: {(-10,1),(1,8),(-4,-2)} {(-4,1),(1,1),(-2,-2)} {(-5,1),(1,-7),(21,-2)} For a function not to be a ...
|
| Which column is greater.
... | 7/10/2005 |
Q: Which column is greater. Column A Column B ...
A: 3x^2 + 4x = 15 x^2 + (4/3)x = 5 x^2 + (4/3)x + (4/9) = (139/9) (x + (2/3))^2 = (139/9) x + (2/3) = ...
|
| Which system has infinitely... | 7/9/2005 |
Q: Which system has infinitely many solutions? y=2x+6, y -8x=21....4x-4y=4, x-y=1....4x+2y=5, ...
A: ANS : 4x - 4y = 4 x - y = 1 If the 2 equations end up with the same slope and the same ...
|
| State the possible number... | 7/9/2005 |
Q: State the possible number of imaginary zeros of f(x)=10x^3 -4x^2+2x-6.
A: There are 2 imaginary values. Sorry i couldn't show you mathematically how to find them. To find ...
|
| Compare the quantities in... | 7/8/2005 |
Q: Compare the quantities in Column A with the quantity in Column B. Given the information ...
A: a + bi = (3 + i)(4 - 2i) c + di = (-2 - 3i)(3 + 5i) a + bi = (3 + i)(4 - 2i) = 12 - 6i + 4i - 2i^2 ...
|
| Solve by completing the square... | 7/8/2005 |
Q: Solve by completing the square 3x^2-8x-6=0.
A: 3x^2 - 8x - 6 = 0 add 6 to both sides 3x^2 - 8x = 6 divide everything by 3 x^2 - (8/3)x = 2 ...
|
| Determine whether the function... | 7/7/2005 |
Q: Determine whether the function f(x)=-x^2+4x has a mimimum or maximum value.
A: f(x) = -x^2 + 4x if x^2 is negative, then you have a maximum value, and here is how you can find it ...
|
| List all the possible rational... | 7/7/2005 |
Q: List all the possible rational zeros of p(x)=2x^3-3x^2+4x-6.
A: p(x) = 2x^3 - 3x^2 + 4x - 6 2x^3 - 3x^2 + 4x - 6 = (2x^3 + 3x^2) + (4x - 6) (2x^3 - 3x^2) + (4x - ...
|
| Which describes the number... | 7/7/2005 |
Q: Which describes the number and type of roots of the equation of x^3-4x^2+50x+7=0? Is it 1 positive, ...
A: x^3 - 4x^2 + 50x + 7 = 0 Since i don't know how to factor all cubic equations, i went to ...
|
| One factor of x^3+2x^2-11x-12... | 7/7/2005 |
Q: One factor of x^3+2x^2-11x-12 is (x-3). What are the remaining factors?
A: (x^3 + 2x^2 - 11x - 12)/(x - 3) Using synthetic division 3'|'1'2'-11'|'-12 ''|'''3''15'|''12 ...
|
| Solve b^4+2b^2-24=0... | 7/6/2005 |
Q: Solve b^4+2b^2-24=0.
A: b^4 + 2b^2 - 24 = 0 (b^2 + 6)(b^2 - 4) b^2 + 6 = 0 b^2 = -6 b = ±isqrt(6) b^2 - 4 = 0 b^2 = 4 b ...
|
| The motion of a ball scooped... | 7/6/2005 |
Q: The motion of a ball scooped by a field hockey player can be modeled by h=-16t^2, where t is the ...
A: h = -16t^2 22 = -16t^2 (-11/8) = t^2 t = sqrt(-11/8) t = sqrt(-11/(4 * 2)) t = (1/2)sqrt(-11/2) ...
|
| If x+3=12 and 2/3x-y=5, what... | 7/3/2005 |
Q: If x+3=12 and 2/3x-y=5, what is the value of x?
A: If you are talking about x + 3 = 12 (2/3)x - y = 5 x + 3 = 12 x = 9 (2/3)x - y = 5 (2/3)(9) - y = ...
|
| What is the solution to the... | 7/2/2005 |
Q: What is the solution to the system containing these equations? -6x+3y=33 -4x+y=16
A: Depending on how you want this done, i will do it 3 different ways Elimination -6x + 3y = 33 -4x + ...
|
| value | 7/2/2005 |
Q: Which value is the sum of the solutions to x^2-3x-18=0?
A: x^2 - 3x - 18 = 0 (x - 6)(x + 3) = 0 x = 6 or -3 if you are asking for the sum of the intercepts, ...
|
| Geometry | 7/1/2005 |
Q: I asked this question in basic Math but apparently it was "outside the expertise". So I'm sorry but ...
A: s = sqrt(x^2 + y^2 - 2xy*cos(A)) t = sqrt(x^2 + y^2 - 2xy*cos(B)) If you square those 2 and put ...
|
| Simplify (d^3)(d^4)^5.... | 6/27/2005 |
Q: Simplify (d^3)(d^4)^5.
A: (d^3)(d^4)^5 (d^3)(d^(4 * 5)) (d^3)(d^20) d^(3 + 20) d^(23) You may already know this, but when ...
|
| Evaluate i^21.... | 6/27/2005 |
Q: Evaluate i^21.
A: i = sqrt(-1) i^2 = -1 i^3 = i^2 * i^2 = -1 * i = -i i^4 = i^3 * i = -i * i = -(i^2) = -(-1) = 1 ...
|
| Solve by completing the square... | 6/27/2005 |
Q: Solve by completing the square 4x^2 +2x - 1 = 0.
A: 4x^2 + 2x - 1 = 0 add 1 to both sides 4x^2 + 2x = 1 divide everything by 4 x^2 + (1/2)x = (1/4) ...
|
| Half-Life | 6/24/2005 |
Q: The half-life of polonium-210 is 138.4 days. How many milligrams of polonium-210 remain after 415.2 ...
A: N = No * (1/2)^(415.2/138.4) N = 2 * (1/2)^(3) N = 2(.125) N = .25mg N = 2.5 * 10^-1 I am not ...
|
| fractions to decimals | 6/22/2005 |
Q: ok if you look at a chart for the fractions of 9's; 1/9 = .1 repeating 2/9 = .2 repeating 3/9 = .3 ...
A: 9/9 = .999999, however when you get to the end, you eventually will have to round the last number, ...
|
| math | 6/22/2005 |
Q: 3/4 + 7/8 = next one is 1.24 divided by 7.25 i need to know how to work these problems and the ...
A: (3/4) + (7/8) Multiply everything by 8 and you get (6/8) + (7/8) (13/8) or 1 and (5/8) or in ...
|
| half lives | 6/21/2005 |
Q: If a scientist purifies 1.0 gram of radium-226, how many years must pass before only 0.50 gram of ...
A: This is the only kind of info i could find, if you could give me what that symbol value is that is ...
|
| decimals | 6/19/2005 |
Q: true or false? It is not necessary to round off the decimal equivalent of 3/8, 0.375, when adding ...
A: I think the answer is TRUE. if you are saying (3/8) + (3/4) (3/8) + (6/8) (9/8) 1.125 So either ...
|
| percents | 6/19/2005 |
Q: what is the correct procedure of finding what percent one number is of another number?
A: n(p/100) = V n = number p = percent's value, as in 25% is 25 V = Value so if 45 is what percent of ...
|
| decimals | 6/19/2005 |
Q: if the 1965 production was 20% of the 1964 production and the 1964 production was 50 tons, the 1965 ...
A: The way this shows 20% of x x = the 1964 production, then 50 * .2 = 10 tons so the 1965 ...
|
| Length of triangle sides | 6/18/2005 |
Q: To: Sherman D. I need to know the length of the long side and next to longest side of a right ...
A: If you are saying that the 30° forms the hypothenuse and the base, then a/(sin(A)) = b/(sin(B)) ...
|
| i have a problem solving this | 6/13/2005 |
Q: 1. The daily cost,C(in dollars), to produce x portable 12inch TV given by C(x)= X^2 -80x+2000. How ...
A: 1.) The daily cost,C(in dollars), to produce x portable 12inch TV given by C(x)= x^2 - 80x + 2000. ...
|
| math | 6/13/2005 |
Q: ok this question is hard i hope u can help me thanx? Heidi, a jewelry salesperson, earns a ...
A: If she earns 55 for each diamond, thats the same as saying 55w and if she needs to make 605, then ...
|
| asymptotes | 6/12/2005 |
Q: ------------------------- Followup (x^3 + x^2) Divided By (x + 1) wouldn't the quoitient be ...
A: (x^3 + x^2)/(x + 1) (x^2(x + 1))/(x + 1) x^2 Good question, but in a way, you are only half ...
|
| triangle trignometry | 6/12/2005 |
Q: find the measure of the largest angle in triangle ABC. 1) b=10, c=5, angle B=20 degrees 2) a=12, ...
A: I'm not 100% sure if these are correct. 1.) b/(sinB) = c/(sinC) 10/(sin(20)) = 5/sin(C) 5sin(20) = ...
|
| triangle trignometry | 6/12/2005 |
Q: triangle ABC is a right triangle with right angle C. 1) if a=2 and b=7, find angle A. 2) if angle ...
A: 1.) a = 2 b = 7 A = ? a^2 + b^2 = c^2 2^2 + 7^2 = c^2 4 + 49 = c^2 c^2 = 53 c = sqrt(53) 2/sinA = ...
|
| asymptotes | 6/11/2005 |
Q: we recently learned about oblique asymptotes in intro to caclulus and we learned that all asyptotes ...
A: Parabolas are only on one side of the graph. Hyperbolas are on 2 sides of a graph. Oblique ...
|
| mathematics | 6/7/2005 |
Q: find the point on the x-axis,which is eqidistant from (7,6) and (-3,4).
A: Since you want a point on the x-axis, however we only know that one thing, so the "x" value is not ...
|
| trigonometry | 6/6/2005 |
Q: how to show (2cosX-3sinX)^2=<13 for all values of X? thank you.
A: (2cos(x) - 3sin(x))^2 <= 13 sqrt both sides 2cos(x) - 3sin(x) <= sqrt(13) 2cos(x) - 3sin(x) <= ...
|
| precalculus | 6/5/2005 |
Q: find a model for simple harmonic motion satisfying the specified conditions. Displacement ...
A: according to the sites i have seen, because i don't remember doing this in precalculus, which i ...
|
| precalculus questions | 6/5/2005 |
Q: 16. Lenght- The sun is 20deg above the horizon. Find the lenght of a shadow cast by a building that ...
A: 16.) Since the Sun is 20° above the horizon, if i am correct thats as if you were looking up at the ...
|
| precalc | 6/5/2005 |
Q: solve based on a right triangle B| a ...
A: I'm assuming i just have to find angles A and/or B since we can tell that angle C is 90° from the ...
|
| precalc | 6/5/2005 |
Q: evaluate the expression without the aid of a calculator 1. arcsin 1/2 10. arctan sqrt3 15. ...
A: On some of these, just work with the familiar degrees you are use to, like degrees in 90°s, 30°s, ...
|
| maths expert | 6/3/2005 |
Q: can u help me by giving me some formulaes or some techniques by which i can predict answers in ...
A: believe it or not, i didn't know even half of what you want, until i registered with this website to ...
|
| asymptotes | 6/2/2005 |
Q: The graph of y=x/(1-absolute value(x)) has A. no horizontal asymptotes and one vertical asymptote ...
A: y = x/(1 - |x|) lets do it this way whatever value makes the denominator 0 will give you vertical ...
|
| Math for Home Schoolers | 6/1/2005 |
Q: What low cost options do you recommend in which my live at home wife can provide advanced math to my ...
A: Here are some of my favorite sites. www.math.gatech.edu/~cain/notes/calculus.html ...
|
| mathematics | 5/30/2005 |
Q: I have two questions that are giving me a problem. I hope you can show me the process in solving ...
A: (n/(n - 1)) * (1/n) * (n/(n + 1)) = (5/k) ((n * n)/((n - 1)(n + 1))) * (1/n) = (5/k) ((n^2)/(n^2 + n ...
|
| circles | 5/28/2005 |
Q: I am building a circle patio and need to determine how many 16" diameter circles will fit into a 10' ...
A: Here is how you calculate the answer. Area = Pi * ((d^2)/4) (A1)/(A2) A1 = Area of Larger Circle ...
|
| partial fractions | 5/26/2005 |
Q: write the rational expression as a sum of partial fractions. 1) x^2 + 8 / x^3 + 3x^2 + 2x
A: (x^2 + 8)/(x^3 + 3x^2 + 2x) (x^2 + 8)/(x(x^2 + 3x + 2)) x^2 + 8 = A(x^2 + 3x + 2) + (Bx + C)x x^2 + ...
|
| algebra | 5/26/2005 |
Q: how do you solve these step by step without using a calculator..i have the answers but i don't know ...
A: 1.) to find this answer, you can use this formula The pythagorean thereom. a^2 + b^2 = c^2 since ...
|
| algebra | 5/25/2005 |
Q: How do you solve these by hand.. and not using a calculator AT ALL. Please try adn e-MAIL me ASAP. ...
A: 1.) (5/(2/3)) + (3/8) ((5/1)/(2/3)) + (3/8) ((5/1)*(3/2)) + (3/8) (15/2) + (3/8) Multiply everything ...
|
| precalc | 5/25/2005 |
Q: Find the period and amplitude. 1. y = 3 sin 2x 2. y = 2 cos 3x 3. y = (5/2)cos (x/2) 4. y = -3 ...
A: Don't know if you already did it or not, but #13 isn't listed. Sine/Cosine y = Asin(wx - o) A = ...
|
| Gas Prices | 5/23/2005 |
Q: This isn't a homework question, just a personal pickle. I take somebody different places and I'd ...
A: GM is the amount of distance you can travle and only burn one gallon of gas. The formula as you may ...
|
| precalc | 5/22/2005 |
Q: evaluate the cosine and the tangent of the angle without using a calculator 46. 300 deg 52. pi/4 ...
A: Welcome back Amy. I hope i answered your previous questions on this similar math, correctly. On ...
|
| factoring | 5/22/2005 |
Q: why multiply everything by (x + 1)^(7/2).And I dont really understand anything after that.Please ...
A: lets say you have x^(1/2) - (x^2)^(-7/4) whereas "x" = x + 1 and the reason why i put x^2 instead ...
|
| factoring | 5/20/2005 |
Q: Can you please explain to me how to factor completely the following problem: ...
A: nice work on the ()s, but make sure to separate the sqrt(x + 1) from (x^2 + 2x + 1)^(-7/4) when you ...
|
| Can you tell me if these are correct | 5/18/2005 |
Q: it says to solve each equation if x=5 for example 1=y-5 so y=6,x/5=y so y=1,5x=y so 5*5=y so ...
A: x/5 = y so y = 1 Correct -------------------------- 5x = y so 5*5 = y so y = 25 Correct ...
|
| xy coordinate plane | 5/16/2005 |
Q: in the xy-coordinate plane, the graph of x=(y^2)-4 intersects line L at (0,p) and (5,t). What is the ...
A: x = (y^2) - 4 (0,p) and (5,t) m = (5 - 0)/(t - p) m = 5/(t - p) x = (y^2) - 4, (0,p) 0 = p^2 - 4 ...
|
| limits of infinite sequences | 5/15/2005 |
Q: find the limit of the specified sequence or state that the limit doesn't exist. 1) 1/3, -1/9, 1/27, ...
A: I don't think either one of these have a specific limit and here is why. 1.) You have both positive ...
|
| precalc | 5/15/2005 |
Q: Find the values of the Ø omdegrees and radians using a calculator 44. (a) cosØ = 0.9848 (b) ...
A: 44.) (a) cosØ = 0.9848 Ø = 10.0026 degrees, .1746 radians (b) cosØ = 0.8746 Ø = 29.0023 ...
|
| pre calculus | 5/15/2005 |
Q: the point is on the terminal side of an angle in standard postition. Determine the exact valuse of ...
A: This is for my knowledge as well as yours, if you are not familiar with it already. sin = y/r cos = ...
|
| precalc | 5/15/2005 |
Q: 62. A six foot person satanding 20 feet from a street light casts a 10 foot shafow, what is the ...
A: 62.) (6/10) = (x/20) 120 = 10x x = 12 feet ANS : 12ft ...
|
| pre calculus | 5/15/2005 |
Q: find the values of Ø in degrees and radians by using the calculator. 43. (a) sin Ø= 0.0145 (b) ...
A: 43.) (a) sin Ø = 0.0145 inverse sin both sides in degrees and radians mode, and you get Ø = .8308 ...
|
| Circumfrence of a circle | 5/13/2005 |
Q: Can You please explain to me how to find the radius and diameter of a circle using 3 1/7 for pie if ...
A: C = 2 Pi r = Pi d To find the radius 110 = 2(3 1/7)r 55 = (3 1/7)r or 55 = (22/7)r multiply both ...
|
| sequences and series | 5/12/2005 |
Q: 1) show that (-1)^1 + (-1)^2 + (-1)^3 + ... + (-1)^n= ((-1)^n-1)/2
A: if "n" is even both sides will equal 0. for ex: n = 12 (-1)^1 + (-1)^2 + (-1)^3 + (-1)^4 + (-1)^5 + ...
|
| precalculus | 5/8/2005 |
Q: Sketch a right triangle corresponding to the trigometric function to use to help find the other five ...
A: I have no idea for sure if these problems are all 100% correct or not. If i don't know how to put ...
|
| discrete math | 5/8/2005 |
Q: hope you can handle this subject ,or can find someone. My question; Analyze the following : P ...
A: i "BELIEVE" the answer is A.) Info found at http://www.uea.ac.uk/~j108/propcalculus.htm its the ...
|
| LOGARITHMIC | 5/5/2005 |
Q: Mr. Sherman, I figured you could show me how to do this question. My question is How do you graph ...
A: since you can't do bases, here is what you should do instead of doing log(base 4)x, you should type ...
|
| nut sure is you can help | 5/4/2005 |
Q: My questions are the following: Find the limit of each function as x approaches infinty and as x ...
A: 1.) If by this you mean g(x) = 1/(2 + (1/x)) 2 + (1/x) (2x + 1)/x 1/((2x + 1)/x)) (1/1)/((2x + ...
|
| trignometric addition formulas | 5/3/2005 |
Q: 1) use the half-angle formula to find sin75 degrees w/o a calc. 2) use half-angle formula to find ...
A: By the way, these are in degrees, if you want them in radians, go to www.quickmath.com sin((1/2)A) ...
|
| Need Help Solving FOUR Unknowns | 5/3/2005 |
Q: I have THREE problems, with FOUR unknowns in each, is there any way I can solve them , I assume I ...
A: In short, this problem has infinite possibilities. 6s + 6d + 9a + 10p = 20 10s + 9d + 5a + 6p = 30 ...
|
| Change measurments to smaller units? | 5/3/2005 |
Q: can you tell me if these are right? 8 1/4lb=132oz.,1/2lb=8oz.,4 ...
A: 1T = 2,000lbs 1 lb = 16oz. 8 1/4lb = 132oz., correct 1/2lb = 8oz., correct 4 1/4lb = 68oz., ...
|
| pre calculus questions | 5/2/2005 |
Q: Determine the exact values of the six trigometric functions of the angle 0 (with theline through it) ...
A: 2.) This one i can't really do. Find the point (x,y) n the unit circle that corresponds to the real ...
|
| algebra | 4/23/2005 |
Q: 1. When a function is one-to-one, it has an inverse function. If a function is not one-to-one, can ...
A: 1.) Sorry can't really help you, but if you are talking about variables with exponents higher then ...
|
| algebra | 4/23/2005 |
Q: solve the equations...please show me how you figured them out.. also by even usign the ...
A: There are 2 ways to type your problem at quickmath, so that they will work at site. log(b)x = y ...
|
| algebra | 4/22/2005 |
Q: solve the equations. Please show me how you found the answer step by step. 1. (1/27)^2x+1 = 9^3x-6 ...
A: 1.) (1/27)^(2x + 1) = 9^(3x - 6) (3^(-3))^(2x + 1) = (3^2)^(3x - 6) 3^(-3(2x + 1)) = 3^(2(3x - 6)) ...
|
| pre calc again. Thanks! | 4/20/2005 |
Q: The question is: The number of bacteria in a petri dish culture after t hours is B= ...
A: You ever done Continous Compound Interest The formula for that is A = Pe^rt Look familier, lol. A ...
|
| Another pre-calc question | 4/19/2005 |
Q: Well the question is confusing. Here is a problem that has an answer in the back of the book. ...
A: 9^(2x), base 3 if by this you mean 9^(2x) = 3 (3^2)^(2x) = 3 3^(2 * 2x) = 3 3^(4x) = 3 4x = 1 x = ...
|
| Another pre-calc question | 4/19/2005 |
Q: I need help with a homework assignment. I am confused as to what I am supposed to do. The questions ...
A: are you saying 1.) 16^(3x) = 2 and 2.) (1/27)^x = 3 if so, then 1.) 16^(3x) = 2 (2^4)^(3x) = 2^1 ...
|
| pre-calc question | 4/18/2005 |
Q: I have a homework assignment do tonight and I am a little confused about the function f(x)=3. Is it ...
A: this seems like its an even function, since f(x) = 3 is the same as y = 3. Its like a parabola, only ...
|
| pre calculus | 4/13/2005 |
Q: find(if possible)the complete and supplement of each angle. 22. (a) pi/12 (b) 11pi/12 24. (a) ...
A: 22.) (a) pi/12 Complimentary = (pi/2) - (pi/12) ((6pi)/2) - (pi/12) ((6 - 1)pi)/12 (5pi)/12 ...
|
| quadratic equations | 4/13/2005 |
Q: I have 2 questions that I can't solve, each for a different reason: 1. 1/5(3x^2-10)=18x, write the ...
A: If by this you mean 1.) (1/5)(3x^2 - 10)) = 18x becomes (3x^2 - 10)/5 = 18x mulitply both sides by ...
|
| Math | 4/12/2005 |
Q: ------------------------- Question - !simplify the following questions. When possible reduce to ...
A: Let me see if i get this straight a) ((a - b)^3 * (x + y)^2 * (3p - 9)^4) / (3(x + y) * (3p - ...
|
| limit help | 4/12/2005 |
Q: What is the limit as x approaches 3 of (sqrt(x+1)-2)/(x-3). I'm having a lot of difficulty figuring ...
A: if you go to www.calculator.com, click on Graphing, and type in the exact problem, you will get a ...
|
| Math | 4/11/2005 |
Q: simplify each rational expression below and state the non-permissible value. ^=exponent a) ...
A: a.) ((a^2 + 7a + 12)/(a^2 + 4a + 4)) * ((a^2 - a - 6)/(a^2 - 9)) ((a + 4)(a + 3))/((a + 2)(a + 2)) ...
|
| Irregular Semicircle area | 4/7/2005 |
Q: Mr. Sherman, Thank you for your reply, I have a jpeg of the image, it is fairly rough but accurate, ...
A: is it an online jpg. file or is it a scanned file. Usually you can either drag it to an outlook ...
|
| advice | 4/6/2005 |
Q: I can't say i really love mathematics, but it is ok. The problem is that i have to use it, and so, ...
A: if you can give me specifics, like what kind of math formulas you are having trouble with, i might ...
|
| Irregular Semicircle area | 4/6/2005 |
Q: I need to find a method of calculating the area of an irregular semicircle, it is irregular in the ...
A: if you are talking about an ellipse, which is like a circle, only not evenly symmetrical. Area = Pi ...
|
| The Language of Algebra adn Integers | 4/4/2005 |
Q: Algebra One 1.simplify the expression : (12m + 4n) + (3m + 7n) 2.Austin has 42 paper back books that ...
A: 1.) (12m + 4n) + (3m + 7n) 12m + 4n + 3m + 7n (12 + 3)m + (4 + 7)n 15m + 11n ...
|
| Analysis of Functions | 4/3/2005 |
Q: (sin+cos)^2/(1+2sin cos)
A: ((sinA + cosA)^2)/(1 + ((2sinA)(cosA))) ((sinA + cosA)(sinA + cosA))/(1 + 2sinAcosA) (sinA^2 + ...
|
| solving polynomial | 4/3/2005 |
Q: i was wondering if you could show me how to solve this: x^(3/2) + (1+x^3)^(1/2) i want to get it ...
A: x^(3/2) + (1 + x^3)^(1/2) x^(3/2) + (x^3 + 1)^(1/2) (x^(3/2) + (x^3 + 1)^(1/2))^2 (x^(3/2) + (x^3 + ...
|
| Mathematics - Please Help | 3/29/2005 |
Q: Please HELP. I can't figure it out. I need some help in math. I don't know what to do on these ...
A: A = P(1 + (r/n))^nt A = 2400(1 + ((.035)/1)))^(1 * 13) A = 2400(1 + .035)^13 A = 2400(1.035)^13 A = ...
|
| right triangle trignometry/law of cosines (?) | 3/28/2005 |
Q: 1) find the measure, to the nearest tenth of a degree, of the vertex angle of an isosceles triangle ...
A: 1.) on this, you are saying 5,5,8 a^2 = b^2 + c^2 - 2bc(cosA) 8^2 = 5^2 + 5^2 - 2(5 * 5)(cosA) 64 = ...
|
| trignometric identities | 3/28/2005 |
Q: prove the identity. 1) (tan t/1 - cot t) + (1 + cot t/tan t)= (tan^2t + 2 - csc^2t/tan t -1)
A: (tan(t)/(1 - cot(t)) + ((1 + cot(t))/(tan(t)) = (tan(t)^2 + 2 - csc(t)^2)/(tan(t) - 1) becomes ...
|
| conversion | 3/25/2005 |
Q: I would like to know how to convert the following 28.8mg/g = ? ug/g I do not know what a ug is ...
A: the "u" stands for micro. 28.8mg/g = (x ug)/g mg = 10^-3 grams ug = 10^-6 grams so to go from mg ...
|
| limits | 3/25/2005 |
Q: I have just purchased the book,Calculus for Dummies,and I found that by limits, it doesn't teach ...
A: (2^x)/x x < -infinity x > +infinity y > 0 y < 0 if "x" were zero, the problem would be ...
|
| trignometry word problems | 3/24/2005 |
Q: 1) a building has a ramp to its front doors to accommodate the handicapped. if the distance from the ...
A: 1.) a = 5 b = 23 a^2 + b^2 = c^2 5^2 + 23^2 = c^2 25 + 529 = c^2 554 = c^2 c = 23.5 feet The ...
|
| How?? | 3/22/2005 |
Q: Hey check this... 1.According to Euler's fmla e^i(pi) = -1 .... rite 2.squaring both sides ...
A: Euler's Formula e^(i * pi) + 1 = 0 or as you said e^(i * pi) = -1 here is where the mistake you ...
|
| science/math related | 3/21/2005 |
Q: It's me again, I hope you can help with these answers or refer me to someone like you did the last ...
A: 1.) KE = (1/2)mv^2 KE = (1/2)(30kg)(20m/s)^2 KE = (1/2)(30)(400) KE = (1/2)(12000) KE = 6000 ANS : ...
|
| Mechanics math | 3/20/2005 |
Q: I hope you can help me with these questions. If not maybe you can direct me to someone who can. I am ...
A: Sorry, can't really help you on 1 and 3, since i haven't taken Physics in 5 years and i use to be ...
|
| precalculus work | 3/19/2005 |
Q: 17. Evaluate the expression 3^(-2 pi) 18. A virus accidently brought to a remote village with a ...
A: 17.) Evaluate the expression 3^(-2 pi) this is the same as saying 3^2^-pi becomes (3^2)^(-pi) ...
|
| precalc | 3/19/2005 |
Q: 2. An automobile manufactorer is introducing a new fuel efficent model and estimates the demand for ...
A: 2.) An automobile manufactorer is introducing a new fuel efficent model and estimates the demand for ...
|
| pre-calc | 3/19/2005 |
Q: 128. Write two or three sentences stating the general guidelines that you would follow when solving ...
A: Here is what i can do. If by these you mean 129. sqrt(48x^2y^5) sqrt((16x^2y^4)(3y)) ...
|
| precalculus | 3/19/2005 |
Q: solve the exponential equation algebraically. Approximate the result to three decimal places. 31. ...
A: 31.) 4(3^x) = 20 3^x = 5 log(3)5 = x x = (log(5))/(log(3)) x = 1.46 ...
|
| trignometric equations | 3/19/2005 |
Q: solve for 0 <= x <= 2pi. leave answers in terms of pi. 1) tan x= cot x (find all 4 solutions for ...
A: tan(x) = cot(x) tan(x) = 1/(tan(x)) (tan(x))^2 = 1 tan(x) = ±1 inverse tan both sides in ...
|
| law of cosines | 3/17/2005 |
Q: 1) a triangle has sides of lengths 5, 8, and 10. what is the measure of its largest angle? 2) 2 ...
A: 1.) lets say side "a" = 5 side "b" = 8 side "c" = 10 Since 10 is the largest side, that will ...
|
| right triangle trignometry/area of triangle | 3/17/2005 |
Q: 1) the sides of an isosceles triangle have lengths 5, 10, and 10. what are the measures of its ...
A: 1.) 2x + (1/2)x = 180 4x + x = 360 5x = 360 x = 72 the angles are 36°,72°, and 72° here is what i ...
|
| precalc | 3/15/2005 |
Q: determine whether each x-value is a solution (or an approximate solution) of the equation. ...
A: 1.) 4^(2x - 7) = 64 4^(2x - 7) = 4^3 therefore 2x - 7 = 3 2x = 10 x = 5 ANS : a. x = 5 ...
|
| pre-calc | 3/15/2005 |
Q: condense the expression to te logarithm of a single quantity. *bracketts are subscripts 47. ln x-3 ...
A: let me know if i have understood you correctly or not 47.) ln(x) - 3ln(x + 1) ln(x) - ln((x + ...
|
| matrics | 3/15/2005 |
Q: you have given {3 1 4} {-1 5 2} {1 0 0} M={-5 -1 2} N={8 -2 -6} I={0 1 ...
A: doing a. and b., you will notice that when multiplying Matrix I, will not change anything that is in ...
|
| ? | 3/14/2005 |
Q: how to do these problems x+[1/2]=11/22
A: x + (1/2) = (11/22) since 22 is the LCD, multiply everything by 22. 22x + 11 = 11 subtract 11 ...
|
| law of sines | 3/12/2005 |
Q: solve each triangleABC. give angle measures to the nearest tenth of a degree and lengths in simplest ...
A: 1.) Angle B = 30 Angle C = 45 b = 9 A + B + C = 180 A + 30 + 45 = 180 A + 75 = 180 A = 105 ...
|
| logarithms | 3/12/2005 |
Q: lg2 + log3 -3log2 (from this how do i get this) lg3 - 2lg2
A: log(2) + log(3) - 3log(2) think of this problem like this x + y - 3x whereas x = log(2) y = ...
|
| Hi, I'm attempting to work... | 3/11/2005 |
Q: I'm attempting to work out this problem but I just can't seem to wrap my brain around it for some ...
A: Inverse Operations and Substitution .03% of n is 3 means .03% * n = 3 since "n" is being ...
|
| Functions | 3/10/2005 |
Q: could you help me solve this problem? Find the domain of the function: ...
A: f(x) = x/(x^2 - 16) f(x) = x/((x + 4)(x - 4)) x = 0 f(0) = 0/((0 + 4)(0 - 4)) f(0) = 0/(4 * -4) ...
|
| -------------------------
... | 3/9/2005 |
Q: A and B are the roots 4x^2 + 3x -5 = 0 im trying to find the a value for (A-3B)(B-3A) A and B ...
A: 3x^2 - 5x + 1 = 0 I will use the quadratic formula, which is nothing more than the conclusion of ...
|
| an unlinear equation | 3/9/2005 |
Q: Sorry for taking your time. Would you please tell me a solution for the quantity of binary search ...
A: (1/(n + 1)) * ((2n!)/((n! * n!))) (1/(n + 1)) * ((2n!)/((n!)^2))) (1/(n + 1)) * (2/(n!)) 2/(n!(n ...
|
| A and B are the roots 4x^2... | 3/8/2005 |
Q: A and B are the roots 4x^2 + 3x -5 = 0 im trying to find the a value for (A-3B)(B-3A) A and B ...
A: 4x^2 + 3x - 5 = 0 add 5 to both sides 4x^2 + 3x = 5 x^2 + (3/4)x = (5/4) find half of (3/4), which ...
|
| solving right triangles | 3/8/2005 |
Q: 1) in triangle ABC, a=12, b=15, and angle C = 65 degrees. find the area of triangle ABC to 3 ...
A: Since the work i have tried doesn't come out right, all i can say is to go to ...
|
| math formulas | 3/8/2005 |
Q: what is the correct formula to determine a growth factor? thanks, mike Answer - i believe the ...
A: According to http://illuminations.nctm.org/index_d.aspx?id=477 Growth Factor = 1 - annual ...
|
| determining possible real roots | 3/7/2005 |
Q: HOw many possible real roots are there for x^5 - 4x^4 + 3x^3 - 2x + 2. My teacher said that there ...
A: If you go to www.quickmath.com, you will find out that this problem factors to (x - 1)(x^4 - 3x^3 - ...
|
| series | 3/6/2005 |
Q: im having a little trouble figuring out when a sequence is a gp .how can i tell ? example ...
A: Since the pattern is to multiply 3, then this is a geometric progression. if it where something ...
|
| solving right triangles | 3/4/2005 |
Q: 1) a student looks out of a second-story school window and sees the topf of the school flagpole at ...
A: 1.) Tan(22) = (x/50) x = 50 * tan(22) x = 20.20131129 ft Now add that to how far he is off the ...
|
| pre-calc | 3/4/2005 |
Q: find the domain, x-intercept, and verticle asymptote of the logarithmic function. *brackets are ...
A: you can never have a 0 or negative log, because the problem would be undefined. For graphs, go to ...
|
| undetermined coefficients | 3/3/2005 |
Q: im supposed to be tutoring a student in calc.4,and i want to make sure how to find general soln ...
A: what do you mean by " and ' by this do you mean y^3 - 2y^2 - 3y and by e^t + 1, do you mean e^(t ...
|
| Circles concerning with chords and arcs. | 3/3/2005 |
Q: A chord of length 19 cm long, cuts an arc creating a right angle. Find the length from the centre of ...
A: Distance from center of circle to chord's midpoint: d d = c cot(theta/2)/2 d = 19 * ...
|
| Functions and Graphs | 3/1/2005 |
Q: 8).A teacher wishes to schedule a quiz or exam during part of a two hour class.The equation 1 + ...
A: 8.) if you have 1 + e = 120 then e = 119 so unless you meant something else, i don't get what you ...
|
| trignometric equations | 2/28/2005 |
Q: solve for 0 <= x< 2pi. round it to the nearest hundredth of a radian. 1) 9 sin x= csc x
A: 9sin(x) = csc(x) csc = 1/(sin(x)) 9sin(x) = 1/(sin(x)) multiply both sides by sin(x) 9sin(x)^2 = ...
|
| solving system of equations with three variables | 2/27/2005 |
Q: I'm in the matrices unit of my course however we have to solve for three variables using system of ...
A: 2x + y + 2z = 16 x + 3y - z = 37 4x - y + 3z = 4 2x + y + 2z = 16 4x - y + 3z = 4 Multiply top by ...
|
| pre-calc | 2/27/2005 |
Q: write logarithmic equation in exponential form *parenthesis mean subscript 2. log(3)81 = 4 4. ...
A: Logaritmic log(b)x = y Exponential b^y = x 2.) log(3)81 = 4 3^4 = 81 4.) log(10)(1/1000) = -3 ...
|
| pre-calc questions | 2/27/2005 |
Q: complete the table for each question to determine the balance for A and P dollars investd at a rate ...
A: For n = 1,2,4,12,365 use I = P(1 + (r/n))^nt For n = Continous, use I = Pe^rt 44.) P = $1000, r = ...
|
| pre-cal | 2/27/2005 |
Q: evaluate the function at the indiated value of x. round three decimal places. 2. f(x)=2.3^x ...
A: 2.) f(x) = 2.3^x for x = 3/2 2.3^x same as saying (23/10)^x (23^(3/2))/(10^(3/2)) Do this, and you ...
|
| sq. ft. and cubic ft. | 2/27/2005 |
Q: i hope this isn't a confusing question for you. my family is moving. we have a home that's about ...
A: If you are speaking space in the house compared to the space in the truck. The space in the house ...
|
| simultaneous equation | 2/26/2005 |
Q: is this question wrong in the first place?/unsolvable? z+y+x=6 2z+y=4 2x+y=8 ans. z=1 y=2 x=3
A: The reason this problem is unsolvable is because there are to many solutions that can work. For ...
|
| algebra | 2/24/2005 |
Q: Numbers 1-3 all go together: 1. Sketch by hand the graph of y = x2. Over what interval of the ...
A: 1. Sketch by hand the graph of y = x2. Over what interval of the domain is the function decreasing? ...
|
| trignometric equation | 2/23/2005 |
Q: 1) solve 3- csc x=7 for 0 <= x < 2pi. give answers to the nearest hundredth of a radian.
A: Just to let you know, to do this, i had my calculator set in Degree Mode, then when i got the ...
|
| trignometric identities | 2/23/2005 |
Q: simplify the expressions. 1) (sec x + tan x)(1 - sin x) 2) cot x + tan x / csc^2 x
A: 1.) (sec(x) + tan(x))(1 - sin(x)) sec(x) = 1/(cos(x)) tan(x) = (sin(x))/(cos(x)) ((1/(cos(x))) + ...
|
| trignometric equations | 2/23/2005 |
Q: solve each equation for 0 <= x < 2pi. give answers to the nearest hundredth of a radian when ...
A: 1.) 2cos(x) = sin(x) 2 = tan(x) tan^-1 both sides x = 1.107148718 x = 1.11 radians ...
|
| -1 | 2/22/2005 |
Q: 1)why is (-1)*(-1)=1 ? 2)sinx=opp/hyp for right-angle triangles, so what does it really means to ...
A: Here are the ones i can answer. 3.) The closest value that people have come up with is Pi = (22/7) ...
|
| complex numbers | 2/22/2005 |
Q: How do you compute x^i? where i is the base of imaginary numbers; x is any real number; carat ...
A: x^i = x^(sqrt(-1)) or x^(-sqrt(-1)) or x^i = x^(sqrt(-1)) or if work the negative side of the sqrt, ...
|
| factoring a cubic | 2/20/2005 |
Q: I understand what you did to the previous cubed power with grouping, but you can't use that for ...
A: yeah, this ones a different one off and i can tell that x = 1, because 1^3 + 1^2 + 1 - 3 = 1 + 1 + ...
|
| percentages | 2/19/2005 |
Q: Are people correct when describing a percentafe of increase to use a percentage larger than 100%? ...
A: ((x - y)/y) * 100 x = finish value y = initial value ((250 - 100)/100) * 100 = 1.5 * 100 = 150% ...
|
| will adding 50% of the previous amount ever add up to anything? | 2/18/2005 |
Q: I'm not good at explaining things so i will give an example. I'm facing a wall 10 meters away. I ...
A: Let me get this straight, you say you stepped 1 meter from the wall, then half a meter or 50cm, then ...
|
| How do you factor cubed powers? | 2/18/2005 |
Q: How would you factor completely, x^3-x^2+5x-5? It seems impossible!If there are more ways than one ...
A: x^3 - x^2 + 5x + 5 (x^3 - x^2) + (5x - 5) x^2(x - 1) + 5(x - 1) since both x^2 and 5 have the ...
|
| pre-calc | 2/15/2005 |
Q: 4: Find the equation of the line that passes through the points: ( 2, 5) , ( -2, -1) 3x - 2y + 4 ...
A: 4: Find the equation of the line that passes through the points: (2,5) , (-2,-1) m (-1 - 5)/(-2 - ...
|
| factoring | 2/11/2005 |
Q: How would u solve 25x^2 + 36 = 60x by factoring
A: 25x^2 + 36 = 60x 25x^2 - 60x + 36 (5x - 6)(5x - 6) this was quite simple to figure out, since 25 ...
|
| suppose f(x)= x^2 - 3x
what... | 2/9/2005 |
Q: suppose f(x)= x^2 - 3x what 3 function would be obtained by shifting this graph 4 units to the ...
A: f(x) = x^2 - 3x shift right, just substitute (x - a) for x shift left, just substitute (x + a) for ...
|
| hard polynomials | 2/9/2005 |
Q: 1. what I meant by parallel was that it was on equal difficulty as my previous problem.can you show ...
A: 1.) I kinda understand you, and yet i can't do it because i explain it, if i completely understood ...
|
| hard polynomials | 2/8/2005 |
Q: (x^3-1)/(x-1) I know the answer is x^2 +x +1,however I don't understand how to get that. One reason ...
A: (x^3 - 1)/(x - 1) ((x^2 + x + 1)(x - 1))/(x - 1) the (x - 1)s cancel out, leaving you with x^2 + x ...
|
| pre-calc | 2/8/2005 |
Q: Write each of the following in logarithmic form. 1. b[n] = x 2. 2[3] = 8 3. 10[2] = 100 ...
A: to do exponents, just hold Shift, and click 6, and you get ^, here is what i mean. the conversion ...
|
| pre-calc | 2/3/2005 |
Q: 1: Evaluate the function at the indicated value of "x" for the next three problems. Round your ...
A: 1.) D.) 3.488 f(x) = 2.3^x, for x = (3/2) think of it like this f(x) = (23/10)^x, for x = (3/2) ...
|
| trigonometric equations | 2/1/2005 |
Q: 3sin^2(theta) - sin(theta) = 1/4
A: if by this you mean 3(sin(theta))^2 - sin(theta) = (1/4) or the way i like to write it 3sin(A)^2 ...
|
| pre-calc | 2/1/2005 |
Q: 1: Graph the following two functions and tell me if it is increasing, decreasing, where it has an ...
A: 1.) (b)increasing asymptote: y = 0 intercept:(0,1) (d)increasing asymptote: y = 0 intercept:(0,1) ...
|
| Algebra | 2/1/2005 |
Q: I am a non-trad student going back to school after several years and my algebra is a little rusty. I ...
A: 49.7 = 2x^2/((1 - x)(2 - x)) 49.7 = 2x^2/((-x + 1)(-x + 2)) 49.7 = 2x^2/(x^2 - 2x - x + 2) 49.7 = ...
|
| pre-calc | 1/31/2005 |
Q: 1: Find the equation of the axis of symmetry of the graph of: y = 2x^2 - 8x + 5 (a)x = 2 (b)x = ...
A: 1.) To find the vertical symmetry, use this y = 2x^2 - 8x + 5 x = -b/(2a) x = -(-8)/(2(2)) x = ...
|
| pre-calc | 1/31/2005 |
Q: 1.Match the rational expression with the correct form of decomposition. (3x - 1)/[x(x - 4)] ...
A: 1.Match the rational expression with the correct form of decomposition. (3x - 1)/[x(x - 4)] (a)A/x ...
|
| mathmatical term | 1/28/2005 |
Q: What is empty set? I have looked up resources for definition but could not quite coprehend their ...
A: http://stat-www.berkeley.edu/~stark/Java/Venn.htm On the site, gray means not taken, blue means ...
|
| pre=calc | 1/27/2005 |
Q: 4: Find the "x" and "y" intercepts and the vertical and horizontal asymptotes for the following five ...
A: 4.) To find x-intercept, whatever value(s) make the numerator = 0, that is the x-intercept To find ...
|
| pre-calc | 1/27/2005 |
Q: 1: Find the Domain, zeros,vertical asymptotes,and horizontal asymptotes for the following three ...
A: 1.) going to www.calculator.com Here is what i saw all Real Zeros x = 0 y = 0 horizontal asymptote ...
|
| Pre-Cal Help | 1/25/2005 |
Q: If X=2 is a root of 2X^3+5X^2-23X+10=0, find the remaining roots. How to I do this
A: (x - 2)(x + 5)(2x - 1) Using synthetic division 2'|'2'5'-23'|''10 ''|'''4''18'|'-10 ...
|
| algebra | 1/25/2005 |
Q: It is required to fit a rectangle of maximum area inside a triangle PQR in which PR = 1 meter , ...
A: At1 = Area of large triangle At2 = Area of medium triangle At3 = Area of small triangle Ar = Area of ...
|
| pre -calculus | 1/24/2005 |
Q: Find the value of [f(x+h)-f(x)]/ for this funtion. Be sure to simplify: F(x)= 1/x+3
A: if what you really meant to type was [f(x + h) - f(x)]/h f(x) = 1/(x + 3) f(x + h) = 1/((x + h) + ...
|
| Math Homework | 1/23/2005 |
Q: I'm Nate, a 14-year old freshman at Exeter Academy. I feel too embarrassed to ask my peers this ...
A: 2x^2 - 5x = 3 x^2 - (5/2)x = (3/2) find half of (5/2), then square it, and add it to both sides ...
|
| pre-calc | 1/23/2005 |
Q: "I'm confused about these three problems, they're similar but I cannot figure them out. 1. 3 ...
A: I will give you a real good mathematical explaination you might be asking your self what to do with ...
|
| pre-calc | 1/23/2005 |
Q: Im confused about a few problems, theyre similar but I do not understand them. 1. write ...
A: 1. write f(x)=x^5+4x^4-2x^3-14^2-3x-18 as the product of linear factors if by this you mean ...
|
| trignometric functions | 1/22/2005 |
Q: find the values of the other 5 trignometric functions. 1) cos x = 24/25, -pi/2 < x < 0 2) cot x = ...
A: I had to get a little assistance to find out how to go about doing one of the problems. For ex: i ...
|
| a problem | 1/21/2005 |
Q: I'd appreciate your help on this...thanks!What is the greatest positive integer n such that 2^n is a ...
A: (6 * 2)^10 = ((2*2) * 3)^10 ((2^2) * 3)^10 Same as saying (2^2^10) * 3^10 same as saying 2^(2 * 10) ...
|
| transformations | 1/21/2005 |
Q: What is the equation of y=x^2 + 4 after: (a)a dilation of 2 (b)a rotation of 180 degrees (c)a ...
A: this is all i can tell you. b.) y = x^2 + 4 becomes y = -x^2 + 4, which keeps the graph at (0,4) ...
|
| pre-calculus | 1/21/2005 |
Q: I'm unsure how to solve these problems. They are complex numbers that are supposed to be written ...
A: 1.) sqrt(-9) - i^2 i = sqrt(-1) so when you square a sqrt, the sqrt and the square cancels out, ...
|
| maths | 1/20/2005 |
Q: What is the limit of (2x +5) /(3x-5) as x approaches 10 I think it is 1 am I correct? Of ...
A: Since i haven't done Limit type problems in awhile, here is what i can tell you. (2x + 5)/(3x - 5) ...
|
| An intricate question (for me...) | 1/20/2005 |
Q: But the key says 32, why?A certain recipe makes enough batter for exactly 8 circular pancakes that ...
A: C1 = Pi * d C1 = Pi * 10 C1 = 10pi 10pi * 8 = 80pi C2 = 5pi 5pix 80pi = 5pix x = 16 I'm ...
|
| forces | 1/18/2005 |
Q: I did 20^2+15^2-2(20)(15)cosA=19^2 and got A=116 degrees;then I did 180-116=64 degrees as my final ...
A: 20^2 + 15^2 - 2(20)(15)cosA = 19^2 400 + 225 - 600cosA = 361 625 - 600cosA = 361 -600cosA = -264 ...
|
| proportions/ratios | 1/18/2005 |
Q: Solve each proportion and write each ratio. Fleas are the world's highest leapers for their body ...
A: A flea that is 7.5 inches, can jump 130x inches in the air. Is what that is saying. 7.5inches = 130x ...
|
| Demand Equation | 1/18/2005 |
Q: Problem: Please help, if you can p = -1/40x + 80 Express the revenue (R) as a function of x. ...
A: if by this you mean P = (-1/40)x + 80 P = -((1/40)x - 80) Assuming by this you mean "p" = profit, ...
|
| evaluating and graphing sine and cosine | 1/15/2005 |
Q: these are physics type problems that are related to sine and cosine. *use this info to solve ...
A: Using 3963mi as the radius of Earth. C = 2Pi * r C = 2Pi * 3963 C = 24900.263372352701... or C = ...
|
| sine and cosine functions- comparisons | 1/15/2005 |
Q: complete each statement with one of the symbols <, >, or =. 1) cos.40°__ cos.30° 2) sin.310°__ ...
A: 1.) cos(40°)__cos(30°) .766 __ .866 ANS : < Think about this, there are 360° in a circle. The ...
|
| Finding the extrema of this parabola and what kind. | 1/14/2005 |
Q: Can you help me with this problem.... y = (x+1)squared -9 Give the extrema and tell what kind? ...
A: y = (x + 1)^2 - 9 y = ((x + 1)(x + 1)) - 9 y = (x^2 + 2x + 1) - 9 x^2 + 2x - 8 To find the "x" ...
|
| trig | 1/14/2005 |
Q: A ship captain at sea uses a sextant to sight an angle of elevation of 37 degrees to the top of a ...
A: The 668.8 in your new calculation refers to how far the ship is from the top of the light house ...
|
| Specialist Mathmatics | 1/13/2005 |
Q: For holiday home work my school has set trig functions. I have started to get stuck because the book ...
A: sin(x) = (-sqrt(3))/2 inverse sin both sides and you get x = -60 so in radians form, the answer ...
|
| Math | 1/9/2005 |
Q: Heidi, a jewelry salesperson, earns a commision of $55 every time she sells a diamond ring. How many ...
A: if someone makes $55 everytime you sell a diamond ring then you are making $55 for each ring that ...
|
| Limits | 1/9/2005 |
Q: Good to go I think I got it I came up with -.5I type it in and the graph shows up but I don't know ...
A: after doing some checking, i believe the answer is 45(2x - 1) or 90x - 45 after clicking Trig ...
|
| trig | 1/9/2005 |
Q: The tide at a boat dock can be modeled by the equation y=-2cos(pi/6t)+8, where t is the number of ...
A: y = -2cos(pi/6t) + 8 same as y = -2cos((180/6)t) + 8 y = -2cos(30t) + 8 7 = -2cos(30t) + 8 ...
|
| verbal problem | 1/9/2005 |
Q: The profit a coat manufacturer makes each day is modeled by the equation P(x)=-x^2+120x-2000, where ...
A: this is quit easy to explain. Since x^2 is negative, you get a graph with a maximum. Anything above ...
|
| Limits | 1/9/2005 |
Q: I came up with 3.5I can't find the Limit lim x->0 (x-tan 2x)/(sin 2x) Help Answer - If you go to ...
A: at calculator.com, you have to type it in exactly like this (x - tan(2x))/(sin(2x)) If you type ...
|
| Limits | 1/8/2005 |
Q: I type it in and the graph shows up but I don't know how to resd it.I can't find the Limit lim x->0 ...
A: if 2x is suppose to be tangented and not just the 2, then you SHOULD TYPE IT IN LIKE THIS (x - ...
|
| Limits | 1/8/2005 |
Q: I can't find the Limit lim x->0 (x-tan 2x)/(sin 2x) Help
A: If you go to www.calculator.com, click on graphing, then type in (x - tan(2x))/(sin(2x)) making ...
|
| sum and differences formula | 1/5/2005 |
Q: my questions is: If sin (insert beta symbol here)= 5/13 and cos (insert theta symbol here) = 4/5, ...
A: sinA = (5/13) cosB = (4/5) cos(A + B) = x inverse sin on both sides A = sin^-1(5/13) inverse ...
|
| miexd number | 1/4/2005 |
Q: with all numbers 0 to 9 (0,1,2,3,4,5,6,7,8,9) (without repetition) create 2 fractional number(mixed ...
A: (48/96) + (135/270) = 1 Here is what i did. First i just did the halves ...
|
| graphig help | 1/4/2005 |
Q: 1.graph: y= -2sinx + 3cosx 2.graph: y= cos(x-2)-2
A: since we can't show you create graphs at this site, here is what i can do. go to these sites. ...
|
| Population growth | 12/30/2004 |
Q: My problem is my understanding of the question posed since it seems vague. Assume that a fish ...
A: p = m/(1 + ae^(-kt)) a.) 1000 = m/(1 + ae^(-.09t)) 1 + ae^(-.09t) = m/1000 ae^(-.09t) = (m/1000) - ...
|
| Limits | 12/26/2004 |
Q: I do not know what to do with the ^x lim x to inf ((3x-2)/(3x+2))^x Help
A: ((3x - 2)/(3x + 2))^x x <= (-2/3) x >= (2/3) if you use the (-2/3), the problem would become ((3x ...
|
| log equations | 12/24/2004 |
Q: If log(x+1) 64=2, find x. (The (x+1) is small and is the base of the log.) I used the change of ...
A: Hey Jeff, my best customer, lol. there is a better method for doing this log(x + 1)64 = 2 ...
|
| circles | 12/21/2004 |
Q: 1) find the equation of a circle whose points (-8, 0) and (0,6) are end points of a diameter.
A: ((x^2)/64) + ((y^2)/36) = 1 By the way, this is an ellipse not a circle. If these are suppose to ...
|
| geometry | 12/19/2004 |
Q: Quadrilateral JAME has vertices J(2,-2),A(8,-1),M(9,3), and E(3,2). Prove that quadrilateral Jame is ...
A: sorry about that, i was doing so much work that i forgot about the area. JA = sqrt(37) AM = ...
|
| trig equations | 12/17/2004 |
Q: Find all values of theta in the interval 0<=theta<2pi that satisfy the equation, sin(2theta) ...
A: sin(2 theta) + cos(theta) = 0 sin(2A) + cos(A) = 0 0 <= A <= 2pi or 0º <= A <= 360º I went to ...
|
| algebraic geometry | 12/17/2004 |
Q: The base of a rectangle is twice the side of a square, and the height of the rectangle is two more ...
A: Ar = Area of Rectangle As = Area of Square Br = 2(Bs) Hr = Bs + 2 Ar = BH As = B^2 Ar = ...
|
| log | 12/17/2004 |
Q: Given: loga 5=2.32 and loga 9=3.17 (The a's are little and are the base of the logs) Find: (a)loga ...
A: Using what is given. a.) log(a)(25/9) same as log(a)25 - log(a)9 using this, you get log(a)(5^2) - ...
|
| proofs | 12/17/2004 |
Q: Quadrilateral JAME has vertices J(2,-2),A(8,-1),M(9,3), and E(3,2). Prove that quadrilateral Jame is ...
A: d = sqrt((x2 - x1)^2 + (y2 - y1)^2) p^2 + q^2 = 2(a^2 + b^2) J(2,-2), A(8,-1), M(9,3), E(3,2) ...
|
| periodic table | 12/14/2004 |
Q: Which group 18 element is most likely to form a compound with the element flourine? 1. He 2. Ne 3. ...
A: Flourine = 1 electron left Helium = 2 electrons left Neon = 2 electrons left Argon = 2 electrons ...
|
| periodic table | 12/14/2004 |
Q: Which metal is most likely obtained by the electrolysis of its fused salts? (1)Au (2)Ag (3)Li (4)Zn ...
A: In short, Alkali Metals are more reactive than Transition Metals. Alkali Metals are the elements in ...
|
| periodic table | 12/13/2004 |
Q: Are the transitional metals active or inactive?
A: There active. Transition Metals have properties similiar to one another and to other metals, but ...
|
| Graphing y=cot(x) | 12/8/2004 |
Q:
A: y = cot(x/4) cotA = 1/(tanA) y = cot(x/4) becomes y = 1/(tan(x/4)) for a graph, go to ...
|
| Intermediate Math | 12/8/2004 |
Q: (Word Problem) A rope that is 344 ft long is to be cut into three pieces such that the second piece ...
A: x + y + z = 344 y = 3x - 6 z = (2/3)y + 2 z = (2/3)(3x - 6) + 2 z = (6/3)x - (12/3) + 2 z = 2x - 4 ...
|
| Intermediate Math | 12/8/2004 |
Q: Solve for x. Give exact answer. x = Square root of 1 + the square root of 1 + the square root of 1 ...
A: not certain what the number is called or its usage. x = Square root of 1 + the square root of 1 + ...
|
| Intermediate Math | 12/8/2004 |
Q: Simplify: (6X(^a+2)Y(^b+2))(-2X(^a-2)Y(^y+1))
A: If by this you mean (6x^(a + 2) * y^(b + 2)) * (-2x^(a - 2) * y^(y + 1)) ((6 * -2) * a^((a + 2) + ...
|
| parabolas | 12/7/2004 |
Q: The coordinates of the focus and the equation of the directrix of a parabola are given. Write an ...
A: Focus (3,5), Directrix y = 1 (x - h)^2 = 4p(y - k) Directrix : y = k - p Focus : (h,(k + p)) h = 3 ...
|
| please help! | 12/4/2004 |
Q: can you please help me with the question below: thnx. Use each of these digits just once: ...
A: Here's the thing, i don't like hard puzzle math questions, so i asked my nephew to do it for me, ...
|
| ellipses | 12/4/2004 |
Q: find the ellipse's standard-form equation from the given information about the foci and the vertices ...
A: Center : (0,0) Vertices: (a,0) (-a,0) Foci: (c,0) (-c,0) Center : (0,0) Vertices : (2,0) and ...
|
| shifting conic sections | 12/2/2004 |
Q: 1) the parabola y^2=8x is shifted down 2 units and right 1 unit to generate the parabola (y+2)^2= ...
A: 1) a.) (y + 2)^2 = 8(x - 1) (y - k)^2 = 4p(x - h) vertex = (h,k) vertex = (1,-2) 4p = 8 p = 2 ...
|
| Statistics | 11/29/2004 |
Q: Class A took a midterm. the mean is 82 and standard deviation is 5
A: Here is about all i can tell you, since SD isn't my thing. SD = Standard Deviation m = mean n1, n2, ...
|
| functions | 11/28/2004 |
Q: give the domain, range, and zeroes of the functions. 1) f(x)= absolute val. [x] +3 2) f(t)= sqrt ...
A: 1.) f(x) = |x| + 3 Domain : -x < 0 or x > 0 Range : f(x) > 3 Zeros : (0,3), so in otherwords there ...
|
| operations of functions | 11/26/2004 |
Q: if f(x)= 3-x / x^2+4 and g(x)=3x, evaluate the following: 1) f(g(x)) 2) g(f(x))
A: if by this you mean f(x) = (3 - x)/(x^2 + 4) g(x) = 3x 1.) f(g(x)) f(3x) = (3 - (3x))/((3x)^2 + 4) ...
|
| Algebra | 11/21/2004 |
Q: I'm in Algebra 3-4. The directions say solve the problem using linear functions as mathematical ...
A: finger(15,105) and toe(22.5,180) d = distance t = time m = (y2 - y1)/(x2 - x1) m = (180 - ...
|
| Simplifying equations | 11/21/2004 |
Q: i would very much appreciate your help. 1.) 2z^3y^2 x 3z^2y x (1/4 zy)^-1 2.) 3^4 x 3^7 x ...
A: 1.) 2z^3y^2 * 3z^2y * ((1/4)zy)^-1 multiply the exponents, also when same variables with exponents ...
|
| Momentum | 11/20/2004 |
Q: If two trains,one loaded with lead, the other empty, are travelling at 60 miles per hour on ...
A: if the train with lead and the train without were both traveling at 60 mph then mathematically they ...
|
| exponential functions | 11/16/2004 |
Q: 1) if $1000 is invested at 8% per year, in about how many years will the investment be worth $2000? ...
A: If you are talking about compound interest for both. A = P(1 + r)^(t) 1.) 2000 = 1000(1 + .08)^t ...
|
| Tricky Homework | 11/15/2004 |
Q: This is a problem that was assigned today and due tomorrow. it is quite tricky and I was wondering ...
A: here are some answers. 1.)the room closest to the front or back door. The reason for that answer is ...
|
| exponents | 11/11/2004 |
Q: 1) (4^7/2 - 49^1/2)^-1/2 2) (1000/27)^2/3 3) (-2x^-1)^-3
A: 1.) ((4^(7/2)) - (49^(1/2)))^(-1/2) 4^(7/2) = (4^7)^(1/2) = 16384^(1/2) = 128 49^(1/2) = 7 so this ...
|
| Please Help | 11/9/2004 |
Q: I'm kind of stuck on a question I would really appriciate if you could help me out. Its an equation: ...
A: Short Version Since they all share the same .0000000016 value, you can just ignore that, according ...
|
| Pre Calc problem | 11/7/2004 |
Q: 1.) 1/(cscx)(sec^2x) = ? a.)1/(sinx)(cos^2x) b.)sinx - sin^3x c.)1/(sinx)(1+tan^2x) d.)sinx - ...
A: if by this you mean 1.) 1/((cscx)((secx)^2))) = (1/(cscx)) * (1/((secx)^2)) (1/(1/sinx)) * ...
|
| properties of functions | 11/6/2004 |
Q: f(x)=2x-1 g(x)= cube root of x+1 h(x)= x^2+2x 1) (f/g)(x) 2) (f open circle g)(x) 3) g^-1(x)
A: f(x) = 2x - 1 g(x) = cbrt(x + 1) h(x) = x^2 + 2x 1.) (f/g)(x) = (2x - 1)/(cbrt(x + 1)) same as ...
|
| equation | 11/4/2004 |
Q: can we call the following equation an exponential equation ?and how can we solve it ? ...
A: if something is in a form of y = ab^x form, its an exponential equation, on one condition, as long ...
|
| chemistry | 11/3/2004 |
Q: Find to the nearest tenth of a degree all nonegative values of theta less than 30 degrees ...
A: sin(theta) + 3cos(2 theta) = 1 i prefer to type it like this sinA + 3cos(2A) = 1 sinA + ...
|
| trig | 11/3/2004 |
Q: The expression(sinx+cosx)^2-1 is equivalent to sin 2x.Why?
A: (sinx + cosx)^2 - 1 = sin(2x) which i like to type as (sinA + cosA)^2 - 1 = sin(2A) ((sinA + ...
|
| chemistry | 11/3/2004 |
Q: A student used a graduating cylinder and a balance to collect the following data: Sample ...
A: if the Vs is introduced first, then we have no idea what the Sample Mass's weight is. If you wanted ...
|
| VerifyingTrig Identity | 11/1/2004 |
Q: cot x / 1-sin x^2 + cos x /(csc x^2) -1 = sec x(sin x^2 + csc x) Can you assist with the solution ...
A: by this do you mean ((cot x)/(1 - sin(x^2))) + ((cos x)/(csc(x^2) - 1)) = sec x(sin(x^2) + csc x) ...
|
| trig | 10/29/2004 |
Q: I added something at the end. Can you please explain what is wrong with my way of doing the ...
A: while in quadrant 1, degrees range from 0° to 90° using cot^2theta - 4 = 0 if you mean (cot ...
|
| chemistry | 10/24/2004 |
Q: Can you please explain to me why: drawing copper into a wire is a chemical or physical change. ...
A: I believe this will be easy to explain. Not certain what you mean by drawing copper, but i believe ...
|
| Trig question | 10/22/2004 |
Q: Hope you can help. Prove that: sin@ /1-cos@ - 1+ cos@ /sin@ = 0 I'm not sure how to find the ...
A: If by this you mean (sinX/(1 - cosX)) - ((1 + cosX)/(sinX)) = 0 multiply everything by (1 - ...
|
| sequences and series | 10/21/2004 |
Q: I have a sequence or series to solve: Term: 1st 2nd 3rd 4th 16, 17, 20, 22 I have to find the ...
A: the only pattern i can see is this 16, 17, 20, 22 20 - 16 = 4 22 - 17 = 5 so i believe your ...
|
| distance problem | 10/19/2004 |
Q: Would you mind taking me through the steps to solve the question? Thanks! **Two cars started from ...
A: s = d/t s = 208/2 s = 104 x + (x + 8) = 104 x + x + 8 = 104 2x + 8 = 104 2x = 96 x = 48 x + 8 ...
|
| Slove for X | 10/18/2004 |
Q: Can you please show me the opeartion to factor the following and solve for X? 3Xsquared + 10X - 8 = ...
A: 3x^2 + 10x - 8 = 0 To do it one way, you could do it like this Using the factors of 3 and -8 will ...
|
| trig | 10/16/2004 |
Q: The expression sinA(cscA-sinA)is equivalent to cos^2A.I can't get that. please help.
A: by this i think you mean sinA(cscA - sinA) = (cosA)^2 sinA((1/sinA) - sinA) sinA((1 - ...
|
| trig | 10/16/2004 |
Q: The value of sin(pi/6) + tan(pi/4)is equal to 3/2. Why? I can't get that. Please help.
A: sin(Pi/6) + tan(Pi/4) = (3/2) Pi is the same thing as saying 180 so, this gives you sin(180/6) + ...
|
| trig | 10/15/2004 |
Q: At which value of x does the graph of y=tan(x+(pi/4)) have a vertical asympote? 1. -pi/4 2. 0 3. ...
A: y = tan(x + (pi/4)) same as y = tan(x + 45) if you plug in the values, here is what you get 1.) y ...
|
| consecutive integers word problems | 10/13/2004 |
Q: Find four consecutive integers such that, twice the sum of the two larger integers, exceeds three ...
A: 1st = x 2nd = x + 1 3rd = x + 2 4th = x + 3 2((x + 3) + (x + 2)) + 91 = 3x 2(x + 3 + x + 2) + 91 = ...
|
| trig | 10/13/2004 |
Q: To the nearest degree, the measure of the acute angle formed by the x-axis and the line that ...
A: (4,7) and (8,10) m = (10 - 7)/(8 - 4) m = 3/4 (4,7), m = (3/4) 7 = (3/4)(4) + b 7 = 3 + b b = 4 ...
|
| pre cal | 10/9/2004 |
Q: I can't seem to solve these two problems. I was wondering if you could help me find the missing ...
A: f(x) = 2x^3 + 3x^2 + 50x + 75 (2x^3 + 3x^2) + (50x + 75) x^2(2x + 3) + 25(2x + 3) since both the x^2 ...
|
| My son was given the following... | 10/5/2004 |
Q: My son was given the following problem, can you please help us figure it out: 3 rows, 3 columns ...
A: there's a problem with your question if you are talking about me using 1 - 9 to equal 10, and i ...
|
| a weird question | 10/5/2004 |
Q: I'd appreciate if you could help me solve this weired question...Thanks. Carlie **Question** A a ...
A: here is how you can tell which is the better one, which ever car gets more mileage for the gallon is ...
|
| quadratic modeling | 10/4/2004 |
Q: Kai realizes that a test grade is a function of the number of hours studied and knows from past ...
A: (1,66), (2,75), (5,90) f(x) = ax^2 + bx + c 66 = a + b + c 75 = 4a + 2b + c 90 = 25a + 5b + c a = ...
|
| applying quadratic functions | 10/4/2004 |
Q: Student editors are designing the yearbook so that each rectangular page will have a perimeter of 40 ...
A: 40 = 2(L + W) 20 = L + W (L + 1.5 + 1) + (W + 1 + 1) = 20 L + 2.5 + W + 2 = 20 L + W + 4.5 = 20 L + ...
|
| inequalities | 10/2/2004 |
Q: 1) a^3+2a^2-4a-8>0 2) 2x^3+x^2-5x<-2
A: 1.) a^3 + 2a^2 - 4a - 8 > 0 (a^3 + 2a^2) + (-4a - 8) > 0 a^2(a + 2) + (-4(a + 2)) > 0 a^2(a + 2) - ...
|
| proportions | 9/29/2004 |
Q: I'm having touble understanding how my book got their equation to solve an example.Here is the ...
A: 84 liters of 20% means 84 * 20% or 84 * .20 so that gives you the (.20 * 84) part as for 84 - x, ...
|
| 1% of 1,000,000 | 9/28/2004 |
Q: I just want to settle a dispute with someone. Please tell me if 1% of 1,000,000 is 100 and 0.1% of ...
A: 1% of 1,000,000 "of" means to multiply 1% * 1,000,000 1% = .01 .01 * 1,000,000 So the answer is ...
|
| general math | 9/26/2004 |
Q: I have a math problem I am a little stuck on. Could you possibly help? "Jack and Jill were flying ...
A: 2 miles = 10560 feet 10560 : 800 5280 : 400 2640 : 200 1320 : 100 660 : 50 330 : 25 66 : 5 ...
|
| polynomial functions | 9/25/2004 |
Q: 1) if 2 is a zero of p(x)= 3x^2 + kx -8, find the value of k. 2) a rectangular enclosure is to be ...
A: 1.) p(x) = 3x^2 + kx - 8 Using synthetic division, you get a remainder of 2k + 12 - 8, which ...
|
| how would you...
find a... | 9/24/2004 |
Q: how would you... find a value for the constant k so that f(x)= (sin3x)/x, x does not equal 0 ...
A: where does k fit into this problem, all i can see or understand is f(x) = (sin(3x))/x and if that ...
|
| exponential & logarithmic functions | 9/24/2004 |
Q: again, I went to www.calculator.com and wasn't able to figure out how to plug my values into the ...
A: when you go to www.calculator.com, make sure to leave out the "y", only when it is in y = form, ...
|
| exponential & logarithmic functions | 9/23/2004 |
Q: 1. Can you give me an example of an exponential function by converting from exponential function to ...
A: 1.) log(base b)x = y means b^y = x when you graph the log(base b)x = y you can type it as y = (log ...
|
| matrices | 9/23/2004 |
Q: When given a matrix "A" that and a Matrix "B" , how do i find matrix "X" such that AX=B?
A: Ax = B x = B/A Same as saying x = (A^-1) * B to do this, go to www.quickmath.com, click on ...
|
| Polynomials - deriving equations from their complex roots | 9/22/2004 |
Q: I have a question concerning two assignments in my math books. The topic is real and imaginary roots ...
A: (x - sqrt(2))(x - PI) = x^2 - PIx - sqrt(2)x + PIsqrt(2) x^2 + (-PI - sqrt(2))x + PIsqrt(2) x^2 - ...
|
| logs | 9/21/2004 |
Q: What is the general form of the function: exponential and logarithmic and can you give me one ...
A: f(x) = log(base b)x g(y) = b^y whereas f(x) = y and g(y) = x, i just put it in function form. ...
|
| Pre-Calculus Word Problem | 9/20/2004 |
Q: How do u solve this problem: In the figure,<EAB and <ABC are right angles. AB=4, BC=6, AE=8, and ...
A: When you draw this out, it should look like a rectangle, with the right side missing, and the bottom ...
|
| math | 9/18/2004 |
Q: 1. when the polynomial 4x^3+mx^2+nx+11 is divided by x+2, the remainder is -7. When the polynomial ...
A: (4x^3 + mx^2 + nx + 11)/(x + 2) Using synthetic division, you get the remainder to be -2n + 4m - 21 ...
|
| graph of polynomial functions- maximum and minimums | 9/17/2004 |
Q: 1) a ball is thrown vertically upward with an initial speed of 60 ft/s. Its height in feet t seconds ...
A: 1.) h(t) = -16t^2 + 60t using the formula for the maximum t = -b/2a t = (-(60))/(2(-16)) t = ...
|
| algebra | 9/17/2004 |
Q: (1/rootx + rootx ) ^2 Can you please explain the above equation. The answer in the book is 1/x + ...
A: don't know if you know this, but when i put ((1/(sqrt(x))) + sqrt(x))^2 where as (1/(sqrt(x))) + ...
|
| algebra | 9/16/2004 |
Q: (1/rootx + rootx ) ^2 Can you please explain the above equation. The answer in the book is ...
A: so if by this you mean ((1/(sqrt(x))) + sqrt(x))^2 Multiply the inside by sqrt(x), and you get ...
|
| math word problem | 9/15/2004 |
Q: One day you went to visit Uncle Harry's farm. You went out to the outer most apple orchard and ...
A: n - ((1/2)n + 1) - ((1/4)n + (3/2)) - ((1/8)n + (7/4)) - ((1/16)n + (15/8)) - ((1/32)n + ...
|
| math/science | 9/14/2004 |
Q: What is the difference between precision and accuracy?Like in my book I did an example saying,"Three ...
A: Precision = Estimate Accuracy = Exact The reason why it is both (1.09 + 1.09 + 1.08)/3 = ...
|
| conversions | 9/12/2004 |
Q: Just with a conversion table, that says centi- is equal to 10^-2, how do you know that 100cm=1 ...
A: 10^-2 = 1/(10^2) = 1/100 or .01 If you were to look at a meter stick you will see that there are ...
|
| conversions | 9/12/2004 |
Q: Is there any shortcut to doing conversions like: 129cm to dm or 12.9g to kg.Using the long way of ...
A: xcm = .01x meters 129cm = .01(129) meters 1.29cm = 1.29 meters xcm = 10x dm 1.29 cm = 10(1.29) dm ...
|
| points and lines | 9/4/2004 |
Q: 1) which of the following points are on the graph of -5x+ 4y = 18? a)(-1.2, 3.0) b) (3,-3/4) c) ...
A: -5x + 4y = 18 4y = 5x + 18 y = (5/4)x + (9/2) a.) (-1.2,3) 3 = (5/4)(-1.2) + (9/2) 3 = -1.5 + 4.5 3 ...
|
| Work Problem- individuals | 8/26/2004 |
Q: I'm so sorry, but I sent you my answer to the question that I wanted to email you! I'm very ...
A: since i am not certain what you are talking about when you said "Subtract the 3 hours she has ...
|
| Work Problem- individuals | 8/26/2004 |
Q: I'd appreciate if you could take me throgh the steps to solve the following queston. Thank you in ...
A: so you are saying that Fritz did (3/8)x x being the whole job and Holly did (5/8)x and the ...
|
| how do you write the numbers:
five... | 8/22/2004 |
Q: how do you write the numbers: five octillion, three hundred forty-five trillion, two six hundred ...
A: octillion = 1 * 10^27 trillion = 1 * 10^12 nonillion = 1 * 10^30 quadrillion = 1 * 10^15 thousand = ...
|
| Conic Sections | 8/21/2004 |
Q: A communications company has determined that the most economical orbit for one of its space labs is ...
A: from radius of earth max : 320 + 6400 = 6720km min : 160 + 6400 = 6560km ((x^2)/(a^2)) + ...
|
| word problem | 8/14/2004 |
Q: Will you take me through the steps to solve the following question? Thak you.One month Mary used 1/6 ...
A: (1/6)x + (1 + (1/4))x (1/6)x + ((4/4) + (1/4))x (1/6)x + (5/4)x (4/24)x + (30/24)x (34/24)x ...
|
| Area of a graph | 8/13/2004 |
Q: How can we know the area of a graph - (x/a)^(2) + (y/b)^(2) = 1 is the equation of a ...
A: A = Pi(ab) Here is what i can tell you Coordinates x = a then y = a In (±x,0) and (0,±y) A ...
|
| RATIONAL EQUATIONS | 8/11/2004 |
Q: How are you doing today? Hope all is well. I'm having trouble with these to problems. Here they ...
A: if by these you mean 1.) (x + 4)/2 = (x + 4)/x Cross multiply 2(x + 4) = x(x + 4) divide both ...
|
| logs | 8/8/2004 |
Q: Simplify log(m²) – 5 log m.
A: log(m^2) - 5(log(m)) becomes log(m^2) - log(m^5) becomes log((m^2)/(m^5)) log(m^(2 - 5)) ...
|
| domain function and logs | 8/8/2004 |
Q: Is it possible to see how you worked this out i.e the solutions? 1.What is the domain of the ...
A: I didn't exactly work it, for 1 and 2 i just went to www.calculator.com, clicked on Graphing and i ...
|
| quicker way to solve the problem | 8/4/2004 |
Q: Here's the question from GRE: ***There are 20 rows of seats in an auditorium. If the first row has ...
A: Sherman is a nick name that was given to me in high school 20 + (19 * 20) + (6 + 12 + 18 + 24 + 30 ...
|
| math | 8/3/2004 |
Q: On the previous question where I asked the following, I misprinted the answer to the question.The ...
A: even though i have never done a reverse type SD, here is what i can tell. if you were to subtract ...
|
| standard deviation | 7/30/2004 |
Q: Sherman, My question for you is about standard deviation. This is a question from the GRE(Graduate ...
A: A.) mean = (5 + 5 + 8 + 14 + 18)/5 = 50/5 = 10 Variance = ((5-10)² + (5-10)² + (8-10)² + (14-10)² ...
|
| math | 7/28/2004 |
Q: How do you go from (1/sin^2of theta) + (1/cos^2of theta) to (cos^2of theta + sin^2of ...
A: This will be really simple to explain. lets say this x = sin^2 of theta y = cos^2 of theta so ...
|
| math | 7/26/2004 |
Q: I'm a bit embarresed to ask this question but here I go:Can you write the order of the numbers,0, ...
A: in short, the higher the negative number the less the value and the higher the positive number the ...
|
| precalculus help! | 7/24/2004 |
Q: this is the problem "Find two positive itegers whose sum is 12 and the sum of whose recprocals is ...
A: x + y = 12 (1/x) + (1/y) = (3/8) x + y = 12 y = -x + 12 (1/x) + (1/(-x + 12)) = (3/8) (1/x) + ...
|
| function problem | 7/24/2004 |
Q: I understood the problem. However I was struck up with these 2 problems. 1) Find all possible ...
A: AB = (3,5) and (5,-1) BC = (5,-1) and (k,8) AC = (3,5) and (k,8) AB = (3,5) and (5,-1) AB = ...
|
| math | 7/23/2004 |
Q: What are the exact coordinates for when the equations, x^2+y^2=9 and x=y intersect? The answer is ...
A: x^2 + y^2 = 9 y = x x^2 + (x)^2 = 9 x^2 + x^2 = 9 2x^2 = 9 x^2 = 9/2 sqrt both sides and you get ...
|
| math | 7/23/2004 |
Q: Jill drove at 50 miles per hour for 4 hurs to visit her btrother, Jack.Jillhit traffic on her way ...
A: 50 = Distance/4 Distance = 200 40 = 200/x x = 200/40 x = 5 hours Take the distance going and ...
|
| Homework help | 7/21/2004 |
Q: I am having trouble with the one's below..... The question was - Solve each of the following ...
A: Solve each of the following inequalities. Write solutions in interval notation. 1.) -7 < ...
|
| math | 7/20/2004 |
Q: If theta is an angle in standard position and its terminal side passes through the point ...
A: In previous question, you stated that it was at (-1,0) originally, but then it rotated 60° which put ...
|
| math | 7/20/2004 |
Q: Name the quadrant in which angle A must lie if secA>0 and cscA<0. My book explains the answer and ...
A: according to http://www.oakroadsystems.com/twt/sixfunc.htm it is saying that if sec(A) is negative, ...
|
| math | 7/20/2004 |
Q: If point A(-1,0) is rotated 60 degrees, the coordinates of point A prime would be what?The answer is ...
A: If you were to rotate 60 degree counter-clockwise, you would be at (-x,-y), so so you have to put ...
|
| math | 7/20/2004 |
Q: The value of x in the equation log(x-1)9=2 is what?(the (x-1) is the base).How do you get the answer ...
A: log(b)y = x means y = b^x log(base (x - 1))9 = 2 whereas b = x - 1 y = 9 x = 2 9 = (x - 1)^2 ...
|
| math | 7/19/2004 |
Q: Which expression represents loga sqrt(6)?(the a is the base.)Why is the answer 1.935 .Thank you for ...
A: first of all, you didn't give me any expressions to choose from, so here is what i can tell you. ...
|
| math | 7/19/2004 |
Q: It doesn't tell me it, it shows me it.How do you know just from looking at the graph that the answer ...
A: Here is what i can tell you. if you are saying that your problem gives you y = .73 * x^(2.969) ...
|
| math | 7/19/2004 |
Q: The origin of a coordinate grid is labeled O. Line segment OP forms an angle of 30 degrees with the ...
A: Draw a triangle like at the site below, the top is (x,y), "b" is 30°, "h" is 10, "a" is "x", and "o" ...
|
| POLYNOMIALS | 7/19/2004 |
Q: What is the basic principle that can be used to simplify a polynomial and what is the relevance ...
A: Can you give me some problems, and i can give you want you want. without a problem to go by, all i ...
|
| math | 7/18/2004 |
Q: If a problem gives you a graph(with a logarithm function) and asks which equation(from the multiple ...
A: a.) y = log(base 4)x can also be written as y = (log x)/(log 4) b.) y = log(base 2)x y = (log ...
|
| math | 7/18/2004 |
Q: My book shows 2 graphs, one with the equation, y=3x^4 and the other, 3x^(1/4).It asks the ...
A: j(x) = 3x^4 gives you a graph of (±x,y) k(x) = 3x^(1/4) gives you graphs of (x,±y) for a graph, go ...
|
| math | 7/18/2004 |
Q: The percentage of American homes using central air conditioning has been increasing since first ...
A: y = 1.295463833x + 23.4004904 y = mx + b since "m" can be written in fraction form, that would be ...
|
| math | 7/16/2004 |
Q: In the formula that you gave me, p(t) = A(1 - r)^t, What's A and t. Were you trying to put it in my ...
A: the formula came from http://colbycc.edu/www/math/general/interest.htm but that deals with money, ...
|
| math | 7/16/2004 |
Q: I e-mailed the following question to another expert here because you were maxed out, and he gave me ...
A: 7882 in percent form would be 100% - 78.82% do that and you get 21.28% in the function you are ...
|
| math | 7/15/2004 |
Q: if sinx=8/17,where zero degrees <x<90 degrees, determine the exact value of cos(x+180 degrees)?I ...
A: sin(x) = 8/17 x = sin^-1 (8/17) x = 28.0725 when i plug that in for "x" in cos(x + 180) i get ...
|
| math | 7/15/2004 |
Q: A ball is rolling in a circular path that has a radius of ten inches.What distance, to the nearest ...
A: l = rØ first you have to put 54° in radians, like this x degrees = ((pi)/180)x 54° = (54pi)/180 = ...
|
| math | 7/15/2004 |
Q: Write as a single logarithm: log 2+3log x-(1/2)log b. My book gives the answer, log(2x^3/sqrt(b)). I ...
A: if by this you mean log(2) + 3(log(x)) - (1/2)log(b) becomes log(2) + log(x^3) - log(b^(1/2)) ...
|
| math | 7/15/2004 |
Q: log sqrt(100/n) equals________.My book says the answer is 1-(log n/2), but I can't get it. Please ...
A: log(sqrt(100/n)) or log((100/n)^(1/2)) log(10/(n^1/2)) you can also say log(10) - log(n^(1/2)) ...
|
| math | 7/15/2004 |
Q: Evaluate log41-3log42+(1/2)log416.(all the 4's are small).My book says the answer is (-1/2), but I ...
A: log(base 4)1 - 3(log(base 4)2) + (1/2)(log(base 4)16) this becomes (log(base 4)1) - (log(base ...
|
| triangle | 7/14/2004 |
Q: From the top of a 120-foot-high tower, an air traffic controller observes an airplane on the runway ...
A: | | |19 120| | | ____19__ Tan(19) = x/120 x = Tan(19) * 120 x = ...
|
| math | 7/14/2004 |
Q: Write the inverse of y=logx2(the x is small). The answer is y^x=2, but don't understand how to get ...
A: log(base b)x = y means b^y = x or in this case log(base x)2 = y means x^y = 2 As for ...
|
| math | 7/14/2004 |
Q: If y=log10x(the 10 should be small)and 1<y<2, then which of the following is a true statement? 1. ...
A: y = log(base 10)x 1 < y < 2 y = log(base 10)x becomes x = 10^y so all you have to do is first plug ...
|
| math | 7/13/2004 |
Q: Is y=-3^x a exponential function? The reason I say it might, is:the equation for an exponential ...
A: when i graph y = -(3^x) it turns out to be an exponential graph, but i am not certain how to proof ...
|
| math | 7/12/2004 |
Q: In the problem, solve for y:[(y-6)^-1/2]+5=3,my book shows me how to do the problem and at the end ...
A: here is what you have to do (y - 6)^(-1/2) = -2 becomes 1/((y - 6)^(1/2)) = -2 multiply both ...
|
| math | 7/11/2004 |
Q: 1. My book gives the answer, y-4=(-3)/4(x-3).They could be wrong.If they're not,please show me how ...
A: 1. My book gives the answer, y-4=(-3)/4(x-3).They could be wrong.If they're not,please show me how ...
|
| math | 7/11/2004 |
Q: If f(x)=4^x, what x-value would satisfy the equation f(x) = 64? Why is the answer, 4? Can you show ...
A: f(x) = 4^x f(x) = 64 since f(x) = 4^x and f(x) = 64, therefore 4^x = 64 here is why. b^x = y ...
|
| math | 7/9/2004 |
Q: Write an equation for the line tangent to the circle x^2 + y^2=25 at the point whose x-coordinate is ...
A: x^2 + y^2 = 25 You gave me x = 3, so i get (3,y), so 3^2 + y^2 = 25 9 + y^2 = 25 y^2 = 25 - 9 y^2 ...
|
| math | 7/8/2004 |
Q: Rewrite the equation 2x^2+y^2+4x-10y=21 in standard form.This is a model problem in my book where ...
A: ((x - h)^2/(a^2)) + ((y - k)^2/(b^2)) = 1 2x^2 + y^2 + 4x - 10y = 21 2x^2 + y^2 + 4x - 10y - 21 = ...
|
| math | 7/8/2004 |
Q: A rod pivoted at 1 end is 6 inches long. If the free end rotates in a machine at the rate of 160 ...
A: 1 revolution = 360° 360° = 2pi radians 160 revolution = (2pi)(160) = 320pi radians i took that and ...
|
| math | 7/8/2004 |
Q: The equatorial diameter of earth is approximately 8000 miles.A communications satellite makes a ...
A: Radius of Earth or Re = (De)/2 Re = 8000/2 Re = 4000 miles Radius of Satellite from Earth's center ...
|
| math | 7/8/2004 |
Q: A ball is rolling in a circular path that has a radius of ten inches.What distance, to the nearest ...
A: l = rØ convert 54 into radians, which is x° = x((pi)/180) 54° = 54(pi/180) 54° = (54/180)pi 54° ...
|
| math | 7/7/2004 |
Q: Joey is thinking of changing his cellular phone company.When he spoke to his present phone company, ...
A: a.) C = .03n + 25 Lets say you spent 100 minutes on the phone, and each minute is .03, so thats 100 ...
|
| algebra | 7/7/2004 |
Q: Can you help? add or subtract? (x^4-3x^4+2x^3+10-x)-(x^2+2x)-(x^2+2x) thanks
A: (x^4 - 3x^4 + 2x^3 + 10 - x) - (x^2 + 2x) - (x^2 + 2x) (1 - 3)x^4 + 2x^3 - x + 10 - x^2 - 2x - x^2 ...
|
| math | 7/5/2004 |
Q: Arif estimates that it will take him 8 hours to type his term paper.If he could convince his ...
A: i am not totally certain because i stink at word problems but here goes a.) Since it would take him ...
|
| math | 7/5/2004 |
Q: When Dr. Leroi Mathman, an eccentric scientist, waas asked how long it takes him to get to work, he ...
A: |30 - x| <= 10 this is the same thing as saying ±(30 - x) <= 10 divide both sides by ± and you ...
|
| math | 7/5/2004 |
Q: Why is it that a function and its inverse,whether you do (f o(following)h) or (h o f),the result ...
A: Can you give me an example of a problem. are you talking about that f(h(x))'s inverse equals ...
|
| Please write back now!! | 7/5/2004 |
Q: 1.) x^2/2 - 7x/6= 1 2.) Find all values of k so that t^2 + kt-8 can be factored using integers. ...
A: If by these you mean 1.) ((x^2)/2) - ((7x)/6) = 1 Multiply everything by 6 3x^2 - 7x = 6 3x^2 - 7x ...
|
| math | 7/2/2004 |
Q: By step#4, why isnt it, (-6)^2 - 4(3)(k) >= 0 instead of just = to 0,and the answer will then be ...
A: you may be correct, however to me when it asks for the values of "k" for which the roots of your ...
|
| math | 7/1/2004 |
Q: Name the values of k for which the roots of 3x^2+k=6x are real.Please explain all the ways to do ...
A: 3x^2 + k = 6x 3x^2 - 6x + k = 0 b^2 - 4ac = 0 (-6)^2 - 4(3)(k) = 0 36 - 12k = 0 -12k = -36 k = ...
|
| Parts of an Angle | 6/27/2004 |
Q: .. I have a simple question... What are the parts of an angle? Thank you and more power to you... ...
A: what do you mean by parts of an angle. are you talking about what kind of angles are there, like ...
|
| Simplifying Fractions | 6/23/2004 |
Q: How do you simplify the following: x-3 3x-1 ----------- - ----------- 3x + 4 ...
A: ((x - 3)/(3x + 4)) - ((3x - 1)/(2x - 1)) multiply everything by (3x + 4)(2x - 1) This only works, ...
|
| How do you multiply the following:... | 6/23/2004 |
Q: How do you multiply the following: (6x^2y^-4) (-4x^-3y^-4) 6x squared y to the negative 4th times ...
A: close, but not quite -24x^-1y^-8 or -24 * x^-1 * y^-8 was correct for starters, but to keep going ...
|
| How do you multiply the following:... | 6/23/2004 |
Q: How do you multiply the following: (2 - (sqrt)3 ) (2 - (sqrt)3 ) this is what I have come up ...
A: (2 - sqrt(3)) * (2 - sqrt(3)) (2 * 2) + (2 * -sqrt(3)) + (2 * -sqrt(3)) + (-sqrt(3) * -sqrt(3)) 4 ...
|
| Circles | 6/23/2004 |
Q: Write the equation for the circle with a center at (-2,3) and radius 4 cm. I am not sure how to ...
A: (x - h)^2 + (y - k)^2 = r^2 where as h = -2 and k = 3, r = 4 (x - (-2))^2 + (y - 3)^2 = (4)^2 (x ...
|
| Rational Expressions? | 6/23/2004 |
Q: How do you simplify the expression: 2 - (sqrt)3 --------------- 2 + (sqrt)3 ...
A: (2 - sqrt(3))/(2 + sqrt(3)) Multiply top and bottom by (2 - sqrt(3)) (((2 - sqrt(3)) * (2 - ...
|
| Angles | 6/19/2004 |
Q: I am building a ramp for a wheelchair-bound relative. I took a 5 foot board, propped it against the ...
A: By hand here is why you need, a pencil and the supports. Most people would set the ramp up against ...
|
| Hello,
I'd be very thankful... | 6/16/2004 |
Q: I'd be very thankful if you answer the following two questions: 1-Is there any formula to enable you ...
A: 1. Sorry i don't think there is a way to make that easier. 2.) C = Pi{(a + b)(1 + 3x^2/[10 + sqrt(4 ...
|
| quadrants | 6/13/2004 |
Q: In which quadrant(s) are points that satisfy x dot y < 0?
A: if by this you mean x • y < 0 or xy < 0 if you do it like this xy < 0 becomes y < 0/x it can ...
|
| ?? | 6/12/2004 |
Q: I asked you a question and you gave me the answer but what does this stand for.(*)in math terms.
A: since i can't remember everyones questions, but if your problem was the one that was like this ...
|
| Taylor Series | 6/12/2004 |
Q: Make equation for f(x)= e ^ (x^3) using the Taylor series Example: f(x)= e^(-x) = sum (-1)^n(x)^n/ ...
A: according to http://www.efunda.com/math/taylor_series/exponential.cfm e^x = 1 + (x/(1!)) + ...
|
| Simplify
(-2a^3b^2)^4 ... | 6/11/2004 |
Q: Simplify (-2a^3b^2)^4 divided by (-3a^6b^4)^2
A: ((-2a^3b^2)^4)/((-3a^6b^4)^2) (((-2)^4) * a^(3 * 4) * b^(2 * 4)) / (((-3)^2) * a^(6 * 2) * b^(4 * ...
|
| logarithms | 6/11/2004 |
Q: use the properties of logarithms to rewrite this logarithm as a single logarithm: 2lnx^2 + ...
A: i have no idea if this works or not, since i am treating the "ln" as a variable. I have never dealt ...
|
| PreCalc | 5/30/2004 |
Q: I was asked to analyze the below graph, I'm truly stuck its due in two days and I have no clue where ...
A: to find the x-intercepts go to www.quickmath.com, click Solve(under equations), the type in -7x^8 + ...
|
| application problem | 5/26/2004 |
Q: Plane A can travel 1400 miles in one hour less time than it takes plane B to travel 2000 miles. The ...
A: As = (1400/(Bt - 1)) As + 50 = 2000/Bt As = (2000/Bt) - 50 (1400/(Bt - 1)) = (2000/Bt) - 50 ...
|
| Dice Probability Question | 5/22/2004 |
Q: What the chances of rolling six sets of 18s, by rolling (3 six-sided die) six times?
A: I have no idea if this is correct or not, but here goes. To get a number that you can only get the ...
|
| HELP!!! | 5/22/2004 |
Q: When the snow stopped falling, Kelly, Miguel and Niha rushed outside to build a snow statue. Kelly ...
A: Kelly = Head or h Miguel = Middle or m Niha = Bottom or b Diameter = d C = pi * d Ch = (2/3)Cm Cm ...
|
| percent | 5/22/2004 |
Q: I need a little help with a math problem. Here it is: There are 70 items and within a 400 year span ...
A: Here is how you do it. ((2000000 - 70)/2000000) * 100 = V (1999930/2000000) * 100 = V 0.999965 * ...
|
| math stuff | 5/19/2004 |
Q: how many nine-digit binary numbers do not have any consecutive zeros?
A: if by consecutive zero you mean a zero after another zero, then 111111110 - 011111111 = 9 numbers ...
|
| complete factoring | 5/17/2004 |
Q: how do u solve 2x^2+20+8 2a^2-14a+24 3y^3+15y^2+12y
A: if by this you mean 2x^2 + 20 + 8 you really do mean that, then 2x^2 + 20 + 8 2x^2 + 28 2(x^2 + 14) ...
|
| its exam time... | 5/16/2004 |
Q: so I have more questions then usuall, give steps and answer. 1. simplify (f^8/g^3)^8 2. simplify ...
A: I did all of this in about 2 hours and 20 minutes. The only reason why it took me that long, because ...
|
| problems | 5/11/2004 |
Q: 1. write standard form of the equation of the circle with radius 6 and center at (0,0) 2. write ...
A: Sorry, i had trouble doing 4 and 7. Lets see what i can do for you. Websites that i used, ...
|
| orthogonal polynomials | 5/10/2004 |
Q: I am 26 yeras old Masters student of Tokyo University of Marine Sciences and Technnology. For the ...
A: try this site. http://mathworld.wolfram.com/OrthogonalFunctions.html or ...
|
| geometry | 5/9/2004 |
Q: "1. Determine whether EFGH is a parallelogram, rectangle, rhombus, or square E(2,-3) F(-3,1) G(1,6) ...
A: I will try my best to solve all of them. "1. Determine whether EFGH is a parallelogram, rectangle, ...
|
| Algebra Common Sayings in English | 5/8/2004 |
Q: An example is "what goes around comes around." Because it has to do with a circle. Do you know any? ...
A: i will see if i can try my best. Not totally certain if they fit what you want, but i will explain ...
|
| filling in gaps in my math education | 5/5/2004 |
Q: I work as a tutor in math and feel rusty in some areas if alg. trig. and calculus. Do you know of ...
A: Here is what i have collected over the years. www.factmonster.com/ipka/A0001660.html (measurements) ...
|
| more problems | 5/4/2004 |
Q: some of these problems involve graphing,(like the parabolas) so if you run into one of them you can ...
A: Not totally certain about the directrix and focus problems. 1.)find distance between (4,6) and ...
|
| Maths? | 5/3/2004 |
Q: What is the smallest number which is reversed when two is added to it?
A: 10x + y + 2 = 10y + x 9x - 9y + 2 = 0 9x - 9y = -2 x - y = (-2/9) -y = -x - (2/9) y = x + (2/9) ...
|
| ALgebra | 5/1/2004 |
Q: The question is the hypotenuse of a right triangle 10 inches long and one of the sides is 7 inches ...
A: When dealing with right triangles only, you can use the formula a^2 + b^2 = c^2 a = 7 b = ? c = 10 ...
|
| Intermediate Algebra URGENT | 5/1/2004 |
Q: 1. Write the equation of any parabola that (a)opens up (b) is narrower than the identity and ©) has ...
A: Vertex Formula x = -b/2a -4 = -b/2a -b = -8a b = 8a y = ax^2 + bx + c 1 = a(-4)^2 + 8a(-4) + c 1 = ...
|
| more problems | 4/26/2004 |
Q: ok, so now when I write them, the () will mean a fraction and a / will mean a fraction line, please ...
A: If by these you mean (2/(x - 2)) - (3/(x + 4)) = 0 Multiply everything by (x - 2)(x + 4) 2(x + 4) - ...
|
| finite math | 4/23/2004 |
Q: Well, I have lots of questions...here it goes! 1. GIven y = -2x^2 - 6x + 7 How do I find the ...
A: 1.) y = -2x^2 - 6x + 7 x = -b/2a x = -(-6)/(2*-2) x = 6/-4 x = -3/2 y = -2(-3/2)^2 - 6(-3/2) + 7 y ...
|
| Elimination | 4/20/2004 |
Q: Soybean meal is 16% protein and corn meal is 9% protein. How many pounds of each should be mixed to ...
A: here is what i get 16x + 9y = 12 x + y = 350 Multiply bottom by -9 16x + 9y = 12 -9x - 9y = -3150 ...
|
| URGENT | 4/20/2004 |
Q: Intermediate Algebra 1. Write the equations for a system that contains a circle and an ellipse that ...
A: Sorry i can't really help you. Try finding your answers at www.quickmath.com. However i will try ...
|
| Hey Sherman | 4/20/2004 |
Q: my teacher needs us to study for two quizes this week, and one has problems like these, can you ...
A: Next time, could you please type it like i do, so that i can understand it better. ((x - 4)/(9x)) + ...
|
| I have some problems | 4/17/2004 |
Q: I have a test I need to study for, so can you please explain to me in a step by step way how they ...
A: For graphing, you have 2 choices, go to www.calculator.com, click graphing. If ou go there and you ...
|
| HELP!!! | 4/17/2004 |
Q: Niko came home from school and told his grandmother that he had learned an amazing trick in math ...
A: here is what i can tell you (1000x + 100(x - 1) + 10(x - 2) + (x - 3)) - (1000(x - 3) + 100(x - 2) ...
|
| Math | 4/16/2004 |
Q: Biologists have observed that the chirping rate of crickets of a certain species is related to ...
A: (120,70)(168,80) m = (y2 - y1)/(x2 - x1) m = (80 - 70)/(168 - 120) m = (10)/(48) m = (5/24) y1 = ...
|
| logs | 4/10/2004 |
Q: How do you problems where they give you two examples of logs, such as log 16=a and log 81=b. Then ...
A: log(16) = a log(81) = b and there is no base, then a = 1.20411998 b = 1.90848502 log(16) = ...
|
| Geometry construction | 4/4/2004 |
Q: Goodmorning My questions are: All contruction lines must be clearly shown. (A) (i) Using rulers ...
A: we are unable to draw for an answer. For ex: Here is a triangle drawn, and when it comes out, it ...
|
| Challanging algebra question | 4/2/2004 |
Q: Can you solve the question on the following page: http://ice.prohosting.com/~turingra/mathQ.jpg ...
A: sorry it took so long, it didn't load the first time. V = ((1.3)Pi * R^2 * h) - ((.1) * R^(3/2) * ...
|
| parabolas | 3/25/2004 |
Q: given the focus (3,8) and y=4 as the directrix how do you write the equation for the parabola and ...
A: focus is (h, k + 1/(4a)) directrix is y = k - 1/(4a) 4 = k - 1/4a k + 1/(4a) = 8 k = 8 - (1/(4a)) ...
|
| cu. ft into gallons | 3/24/2004 |
Q: If an oil well produces 50 millon cu. ft of oil a day, how many barrels of oil is that? Also how ...
A: 50 million ft^3 = 374 million gallons Unit converter found at www.convert-me.com/en Now depending ...
|
| hey Sherman! | 3/21/2004 |
Q: Its a new quarter and its already time for another test! Its crazy I know, but anyway heres the ...
A: Logarithmic and Exponential info found at ...
|
| statistics | 3/20/2004 |
Q: I am not sure you can help in this subject.. but, this is the problem I am working. (I am also ...
A: As far as your Test Statistic and your P = part, i don't know how you got it, or i am unfamiliar ...
|
| Function notation... | 3/20/2004 |
Q: Find and simplify: {f(a+h)-f(a)}/h 1. f(x)=4x-3 2. f(x)=4x^2-7x+6 3. f(x)=x^3 4. f(x)=square root ...
A: Please = Parenthesis, Brackets Excuse = Exponents My = Multiply Dear = Divide Aunt = Add Sally = ...
|
| Question about received power | 3/19/2004 |
Q: The question we received in class is as followed along with the work i've used to solve it. Will ...
A: Pr = Po(d/do)^-n divide both sides by Po Pr/Po = (d/do)^-n same as Pr/Po = 1/((d/do)^n) ...
|
| Advanced Math Laws of cosines | 3/18/2004 |
Q: Solve each triangle. Give lengths to three significant digits and angle measures to the nearest ...
A: I don't believe your problem has a solution, but i could be wrong since i haven't done problems like ...
|
| explain the method | 3/18/2004 |
Q: I talked to you yesterday about an equation I was having trouble with. THanks so much for the ...
A: if you know about f(x), where whatever x is, you have to replace x with that value. For ex: f(x) = ...
|
| applied math | 3/17/2004 |
Q: ..I have a question from my Finite Math course...I actually need help with all the questions of this ...
A: as explained in the other problem you sent. With function problems all you have to do is replace ...
|
| applied math | 3/17/2004 |
Q: ..I have a question from my Finite Math course...I actually need help with all the questions of this ...
A: I only have one thing to say, if you have any more questions like this, BRING THEM ON. F(t) = 4t + ...
|
| Rational Numbers | 3/17/2004 |
Q: List the set of rational numbers between 0 and 1 by roster. List the elements systematically, and do ...
A: the numbers are 1/100, 1/50, 3/100, 1/25, 1/20, 3/50, 7/100, 2/25, 9/100, 1/10, 11/100, 3/25, ...
|
| an iq test question | 3/16/2004 |
Q: U will find this question stupid but it's been on my mind for half a day and i've consulted my ...
A: according to the ration, 1 mouse : 1 cracker : 1 minute so it would take 18 mice : 18 crackers : 18 ...
|
| precalculus homework problem | 3/15/2004 |
Q: I'd like some help with this problem please. Give the domain of the function f(x)=1 over the square ...
A: f(x) = 1/(sqrt(1 - x^2)) same as y = 1/(sqrt(-x^2 + 1)) -x^2 + 1 = 0 -x^2 = -1 x^2 = 1 x = ±1 x ...
|
| MATH | 3/15/2004 |
Q: this paper says write the correct number. so here it goes sevan twentyoneth equels one third but i ...
A: seven twentyoneths = 7/21 one third = 1/3 i believe the space between the numbers would be a / so ...
|
| IQ test | 3/13/2004 |
Q: The head of an alligator is 6in, the tail is 2x the size of the head plus half the size of ...
A: h = head t = tail b = body h = 6 t = 2h + (1/2)b b = h + t thats if by 2x the size, you mean 2 ...
|
| Continuous functions | 3/13/2004 |
Q: I want to work out all the continuous functions f, such that x and y are reals and f(x+y)f(x-y) = ...
A: Here is what i can tell you the brackets or braces, just means that the f(x) * f(y) is being ...
|
| finally, the last batch | 3/11/2004 |
Q: hey Sherman, these are the last ones I need to study for I know youve seen these before, I found ...
A: If you are talking about multipling, instead of powers, then Graph y = 4(2x) y = 8x y = 2(1/2)x ...
|
| square roots | 3/11/2004 |
Q: 64x^2y^4 square root of that
A: here is how you do it sqrt(64x^2y^4) = sqrt(64) * sqrt(x^2) * sqrt(y^4) same as sqrt(64) * ...
|
| Hello, please help | 3/10/2004 |
Q: Here is the next batch of problums I need to study for, please show work and answers, thanks, ^ ...
A: If by these you mean 1.) 16^(3/4) = 4thrt(16^3) = 4thrt(4096) = ±8 or (16^3)/4 = (4096)/4 = 1024 ...
|
| hello sir, I need help again | 3/9/2004 |
Q: You were a great help last time, here are some other problems I need to study for a test, can you ...
A: So by these do you mean y = 4(2x) y = 2 * (1/2)x y = -2(3x) find the following f(x) = 3x + 8 ...
|
| Algebra 2 | 3/8/2004 |
Q: Can you help me slove any of these? They deal with my Algebra 2. Thnak you so much for your time! ...
A: 22.) (5x + 7Y)^2 (5x + 7y)(5x + 7y) (5x * 5x) + (5x * 7y) + (7y * 5x) + (7y * 7y) 25x^2 + 35xy + ...
|
| math | 3/8/2004 |
Q: Could you please help me with thisA positive number can be represented by a two-digit numeral. If ...
A: 10x + y = original number 5(x + y) + (10x + y) = 10y + x 5x + 5y + 10x + y = 10y + x 15x + 6y = ...
|
| graphing | 3/8/2004 |
Q: x - 6y= 2y
A: if you have this typed correctly x - 6y = 2y add 6y to both sides x = 8y divide both sides by 8 ...
|
| graphing | 3/7/2004 |
Q: Complet the ordered pairs so that each is a solution. Then plot each solution and graph the equation ...
A: i think you meant to type 2 problems, but if not 3x - 2y = 0 3x = 2y x = (2/3)y 3x - 2y = 0 -2y = ...
|
| precal | 3/7/2004 |
Q: I solve this problem but I don't know how to answer the question. And I also don't know how to put ...
A: To know how to convert from radians to pi, so you know where the radians lay, go to ...
|
| Continuity of functions involving absolute values | 3/3/2004 |
Q: Is this funtion continuous at x=0? f(x) = |x|+|x-1| My textbook says that it is continuous. I ...
A: continuous yes, at zero no. f(x) = |x| + |x - 1| plug in values and you get these (-5,11), ...
|
| Zeros of a Polynomial with Complex Coefficients | 2/28/2004 |
Q: I was wondering about finding the zeros of a polynomial with complex coefficents. Is it even ...
A: when given a problem in ax^2 + bx + c = 0 form, use the formula x = (-b ± sqrt(b² - 4ac))/2a if it ...
|
| Geometry of Surface Area | 2/26/2004 |
Q: I need help with solving surface area of triangular prisms and square pyramids. What is the ...
A: here are some sites http://mathforum.org/dr.math/faq/formulas/faq.pyramid.html ...
|
| Trend analysis | 2/26/2004 |
Q: i probably should have emphasized the statistics part of my question. Excel can calculate the slope ...
A: y = mx + b y = 0(x) + b y = 0 + b y = b so if your y-intercept is equal to your y value. or to ...
|
| Help math question | 2/23/2004 |
Q: [(Square root of 3 divided by 3) plus 1]/ [1- (square root of 3 divided by 3)]
A: if by this mean [((sqrt(3))/3) + 1] / [1 - ((sqrt(3))/3)] same as [((sqrt(3))/3) + 1] / ...
|
| Solving an equation | 2/23/2004 |
Q: Find "a" from below equation 1-[(1-t)^(a-1)/a]/a = G , 0<G<1,a>1, 0<t<1.
A: if by this you mean [(1 - ((1 - t)^(a - 1)))/a]/a = G All i can say is, go to www.quickmath.com, ...
|
| using the factoring method, solve for the roots of the quadratic equation. | 2/22/2004 |
Q: 4 + x^2/3 = 2x + 4
A: if by this you mean (4 + x^2)/3 = 2x + 4 multiply both sides by 3 4 + x^2 = 6x + 12 subtract 6x ...
|
| triganometric functions | 2/22/2004 |
Q: can you help me how to do these problems. I appreciate your help. Find each angle, one positive and ...
A: Since it has been awhile since i have done this, you will have to check to make sure that i am ...
|
| math/algerbra | 2/19/2004 |
Q: how do you cook an egg for exactly fifteen minutes using only a 11 min and 7 min hour glass? please ...
A: Mathematically : (11 - 7) + 11 = 4 + 11 = 15 Worked out : Without boiling them yet, start the 11 ...
|
| Advanced Math (Saxon Series) | 2/18/2004 |
Q: I'm homeschooling so I am having some difficulty with some math problems. Thanks so much for your ...
A: 1.) Not certain on this one, because i suck at word problems. Sorry 2.) The odd numbers are 1, 3, ...
|
| mode? | 2/16/2004 |
Q: Below is the result of a statistical study on a small sample based on an hourly wage rate: wage ...
A: 1.) Mean = 40/11 = 3.64 When rounded, that is what i got. ...
|
| factoring | 2/12/2004 |
Q: xa + 2bx - a - 2b
A: xa + 2bx - a - 2b, or the way i like to write it ax + 2bx - a - 2b (ax + 2bx) + (-a - 2b) x(a + ...
|
| factoring | 2/12/2004 |
Q: 2x + 15yz + 6y + 5xz
A: 2x + 15yz + 6y + 5xz 2x + 5xz + 6y + 15yz 5xz + 2x + 15yz + 6y (5xz + 2x) + (15yz + 6y) x(5z + ...
|
| Math Methods II | 2/11/2004 |
Q: I stink at probability, I am taking this course through distant learning and need help! Here is the ...
A: i stink at probability about as much as you, but here goes anyway. 2 dice, 6 sides, 360 times, 2 ...
|
| math | 2/10/2004 |
Q: could you please help me with thisfind the difference between the two roots of the equation ...
A: if by this you mean x^2 - px + ((p^2 - 1)/4)) = 0 then x = (-b ± sqrt(b^2 - 4ac))/2a x = (-(-p) ± ...
|
| Hard Math Word Problem | 1/29/2004 |
Q: I have a problem that i can not seem to figure out..and i have no clue what kind it would be..Its a ...
A: I watch the cartoon all the time, the shows like Dragonball, Dragonball Z, Dragonball GT, but as far ...
|
| Hello my name is Elizabeth.... | 1/18/2004 |
Q: I am a 17 year old junior in a regular Chemistry 1 class at Winter Park High School and am having a ...
A: SInce it has been awhile since i have done this, i am hoping i am doing it correctly. First ...
|
| pre-cal | 1/12/2004 |
Q: please help me with this problem. Thank you for your help! I really appreciate it! On the day a ...
A: Interest Compounded Continually When interest is compounded continually (in other words, when 'n' ...
|
