| Subject | Date Asked |
|
| Algebra | 11/25/2009 |
Q: This is the statement presented to us ... not sure how to answer it. I think it is backwards but not ...
A: If you think of negative numbers, like -5, thenif you have 8 and you add -5, that is the same as ...
|
| algerbra 3 | 11/24/2009 |
Q: 41-8m=57 -7x+6y-6x
A: Subtract 41 from both sides of 41-8m=57 and get -8m = 57-41 = 16. Divide -8m = 16 by -8 and get m = ...
|
| alegebra 117 | 11/23/2009 |
Q: 1. Many people know that the weight of an object varies on different planets, but did you know that ...
A: a. The equation in terms of r is r = C/w. b. C = wr, w=100, r=3963, so C = 396,300. Using r = ...
|
| Algebra II | 11/21/2009 |
Q: sqrt(8a^9)divided by squrt(b^3) = I am having difficulties solving these types of problems; ...
A: The problem is √(8a^9)/√(b^3). It is known that √8 = √4√2 = 2√2. ...
|
| variables on both sides | 11/20/2009 |
Q: 4(y+1)= 7(y-2) I don't get theses at all
A: The parenthises mean to multiply what is on the outside by each element in the indside. Thus, our ...
|
| Variation and problem solving | 11/17/2009 |
Q: Supose x varies directly with y and inversely with the sqare root of z. If x is 5/2 when y is 2 and ...
A: It is said that x = Ay/√z. Putting in x=5/2, y=2, and z=16 give us 5/2 = 2A*(1/√16) = ...
|
| ap calculus ab | 11/11/2009 |
Q: my problems (set 3): In Exercises 4 and 9, find dy/dx. Use your grapher to support your analysis if ...
A: 4. This is a product rule. That's y = f(x)g(x) where f(x)=x and g()=secx. The derivatives are ...
|
| Enhance my understanding, please.. | 11/11/2009 |
Q: What are extraneous solutions of an equation? And why do they sometimes occur in the process of ...
A: Extraneous solutions arise when we solve the problem by multiplying by some expression that cancels ...
|
| Equation of a Parabola | 11/10/2009 |
Q: I'm not even sure how to start this. I took a stab at it but this just doesn't look right. I'm going ...
A: Take the Angle as A, the Range as R, and the Height as H. We know R = 160 = V0•cosA and H = 60 = ...
|
| algebra | 11/8/2009 |
Q: Subtract and simplify if possible: 2-z/z-9 - 6z-7/9-z
A: I will assume it is really suppose to be (2-z)/(z-9) - (6z-7)/(9-z). Note that if you multiply the ...
|
| algebra | 11/8/2009 |
Q: Solve for x: (x^2 - 5x + 5)^x^2-9x+20 =1 a) 4 and 5 b) 1 and 4 c) 1,4 and 5 d) 2 and 3 e) 1,2,3,4 ...
A: I will assume that since this is suppose to be solvable, it should really be (x^2 - 5x + ...
|
| Symbol help | 11/7/2009 |
Q: My uncle wants me to help with an algebra assignment, their all pretty easy equations, I just don't ...
A: The ^ symbol is used, for example, for 6^2 = 6*6 = 26; 5^3 = 5*5*5 = 125; 3^4 = 3*3*3*3=81. ...
|
| Intermeidate Algebra | 11/6/2009 |
Q: I am struggling a lot with a few questions here. Here they are.... I need to use factoring and the ...
A: Is the equation 7x² - 5x + 15 = 3(5-x²)? That is that same as 7x² - 5x + 15 = 15 - 3x². Adding 3x² ...
|
| algebra | 11/6/2009 |
Q: Multiply: (-4n)^2(3n^5)^2=(-4*3)^2(n*n^5)^2=24 *n^6^2 ? The exponents outside the parentheses has ...
A: The exponets apply to every term inside the parenthesis. For (-4n)^2, you get 16n^2. For (3n^5)^2, ...
|
| ap calculus ab | 11/6/2009 |
Q: my problems (set 3): 2. What is the limit of (4-x²)/(x²-1) as x approaches ∞? (A) 1, (B) 0, ...
A: There may be several question, but they won't take long to answer. 2 Divide numerator and ...
|
| college algebra | 11/5/2009 |
Q: find the intercepts of the polynominal function f(x). find the intervals for which the graph of f is ...
A: The function is x³ + 4x² - 7x - 10. The first one to try is x=1, which gives 1+4-7-10, which is -12. ...
|
| college algebra | 11/5/2009 |
Q: 1. in 1906 the fastest time for an american man to run a mile was 4 minutes and 30 seconds runners ...
A: 1. 1906, 4.5m, 1957, 4m The average is (4.5-4)/(1957-1906) = 0.5/51 = 1/102. 2. 2000 380 2005 392; ...
|
| Algebra Word Problem | 11/5/2009 |
Q: Suppose that the number of cars, C, on 1st Avenue in a city over a period of time t, in months, is ...
A: I can tell this is going to say , 'You're welcome.' Yet if you want to read on, there's more stuff ...
|
| algebra | 11/5/2009 |
Q: I am supposed to use the quadratic formula to solve this equation: x^2-5x= -10
A: To use the quadratic equation, put it in its proper form. That would be x² - 5x + 10 = 0. Thus, we ...
|
| Algebra Word Problem | 11/4/2009 |
Q: Suppose that the number of cars, C, on 1st Avenue in a city over a period of time t, in months, is ...
A: Since the equation we are given is C = p•a^t, the value of a needs to be less than one for the ...
|
| unitary method question | 11/4/2009 |
Q: A garrison of 2000 men has provisions for 54days. At the end of 15days a reinforcement arrives and ...
A: Since there are 2,000 men and there are 54 days of food, that means that there is enough food for ...
|
| Algebra | 11/4/2009 |
Q: Simplify Expression. How do you know when to add or subtract? Example -5x +16-8x-14+10x = -13x+2+10x ...
A: The sign in front tells you. -5x means subtract 5x. +16x means to add 16x; if in front, it would be ...
|
| algebra | 11/4/2009 |
Q: I am supposed to multiply: (v+d)(v^2-vd+d^2) I was using the FOIL method and got confused,I think. ...
A: If we do (v+d)(v^2-vd+d^2), the first term is v^3. Next we do it in pairs. We have v * (-vd) + ...
|
| question | 11/3/2009 |
Q: Please tell me how can i solve it without using any calculator: 0.456/74 85.02/3.678
A: If its a normal calculator, type 0.456, then press the division (/ or ÷), the type 74, then press =. ...
|
| Quadratic Functions | 11/3/2009 |
Q: Gravity. A person holds a pistol straight upward and fires. The initial velocity of most bullets is ...
A: We are given that h(t) = -16t² + 1200t. To see when it hits the ground, solve for when h(t) = 0. ...
|
| algebra | 11/3/2009 |
Q: I am supposed to use rational exponents to write x^1/9 *y^1/5 *2^1/3 as a single radical expression
A: Well, the denominators of all the powers are 9, 5, and 3. Clearly 9 is divisible by itself and 3, ...
|
| algebra | 11/2/2009 |
Q: I need to find the x intercepts for the graph of the equation: y= x^2 + 3x-10
A: TO find the x intercepts, factor the function. 10 = 2*5, and 5-2=3, so the factors are (x-2)(x+5). ...
|
| algebra | 11/2/2009 |
Q: I am supposed to convert to decimal notation: 8.12 * 10^7
A: It is known that 10^7 means a 1 followed by 7 0's. Thus, 10^7 = 10,000,000 (ten million). Multipying ...
|
| LCM of fractions | 11/2/2009 |
Q: I wanted to know as to how we calculate LCM of fractions?? for example finding the LCM of 2/3 and ...
A: To determine the best denominator with fractions, determine the LCM of the denominators. The lowest ...
|
| algebra | 11/1/2009 |
Q: I am supposed to give exact solutions to three decimal places: x^2+12x+36=4 Is it 2.000 and 6.000?
A: If you put in 2 you get 2² + 12•2 + 36, pr 4 + 24 + 36 = 64, which is not 4. It is 4³, however, but ...
|
| algebra | 10/30/2009 |
Q: Solve for x: x^2 + 29 = 4x I don't know which x I am solving for, and the text book doesn't ...
A: There is an x² in the equation, which means it is a parabola. When solving parabolas, put everything ...
|
| math | 10/30/2009 |
Q: suppose you have 32 D quaters and 36 P quaters. what is the greatest number of groups you can make ...
A: It looks like this problem is asking for the greatest common divisor of 32 and 36. If the groups ...
|
| Algebra II | 10/30/2009 |
Q: (x 3 - 4x 2 + 4x - 1) ÷ (x -1). I'm horrible at math like this :(
A: Well, maybe I'll change that :( to a :) or a :•) if there is a nose involved. The problem is x³ - ...
|
| algebra | 10/27/2009 |
Q: A triangle sides have lengths 1/(x+2) , 1/(x+1) , and 1/x , what are the possible values of x ?.
A: First, sides have a positive length, so x>0, x+1>0, and x+2>0 are all met if x>0. Next, note that ...
|
| Algebra II | 10/27/2009 |
Q: 1. 6 + 5 | 2 r - 3 | ≥ 4 2. 8 = | 5 y + 2 | 3. | 2 t - 3 | + 2 = 5
A: 1. Subtract 6 from both sides. We get 5|2r-3| ≥ -2. Since absolute values are always ...
|
| Word problem | 10/27/2009 |
Q: Your brother has $2000 saved for vacation. His airplane ticket is $637. Write and solve an ...
A: He had $2000 originally. He then spent $637 on a plane ticket. Doing the subtrraction, he realized ...
|
| Functions and their graphs | 10/25/2009 |
Q: for the given functions f and g, find the composite fundtions f0g and g0f and state their domains: ...
A: The composite fog(x) is f(g(x)), which means take g and put it in for x in f. The composite g0f(x) ...
|
| College algebra | 10/23/2009 |
Q: i have a couple questions i did them already but i do not know if i did them right. ...
A: The functions are increasing where they have a positive derivative and decreasing where they have a ...
|
| college algebra | 10/23/2009 |
Q: Find (fog)(x) and (gof)(x). Also specify the domain for each. Problem#21) f(x)=1/x-1, g(x)=2/x
A: fog(x) is g(x) put into f(x) as x. I write f(g(x)) = 1/g(x) = 1/(2/x). I rewrite the top, so we have ...
|
| math | 10/23/2009 |
Q: sir please tell what is the difference beetwen sin^(A+B) and sin(A+B)^2. is both of these two ...
A: If you mean the difference between sin²(A+B) and sin(A+B)², here's the difference. On the first ...
|
| algebra | 10/23/2009 |
Q: Determine the linear function whose graph is a line with a slope of 2/3 and contains the ...
A: There is a formulal for this. It is y-y0 = m(x-x0) where (x0,y0) = (-1,3) and m = 2/3. That makes ...
|
| algebra equations with fractions | 10/23/2009 |
Q: What are the steps to solve the following equation: 1/4x + 1/2 = 1/4x - 1/2
A: The first thing I would do would be to multiply each term by 4. That gives x + 2 = x - 2. Subtract ...
|
| Algebra Zero-product problem | 10/22/2009 |
Q: Solve 3x^4=24x by factoring and then using the zero-product principle. I've tried this, and kept ...
A: The problem needs to have all taken to the left, so it is 3x^4 - 24x = 0. Note that a 3x can be ...
|
| math | 10/22/2009 |
Q: find the quotient and remainder 2x^5=4x^4-x^3-x^2+7 by 2x^-1 factor P{x}=2x^4-9x^3+9x^2+x-3 let all ...
A: Find the quotient and remainder 2x^5+4x^4-x^3-x^2+7 by 2x^-1 When you have an exponent that is ...
|
| equations and inequalities | 10/21/2009 |
Q:
A: An equation is where the expressions on the left side of the equal sign are the same as the ...
|
| Matrices | 10/21/2009 |
Q: I have one question please help me regarding that i will very thankful to you. i.e. Show that there ...
A: Let A be a11 a12 a21 a22 and B be b11 b12 b21 b22. Now if we take AB we get a11•b11 + ...
|
| point-slope form | 10/21/2009 |
Q: i can't fiqure out how to slove the problems that ask to Find the equation (in slope-intercept ...
A: The points given are (-1,-3) and (2,-4). I will say that (x1,y1) = (-1,-3) and (x2,y2) = (2,-4). ...
|
| graphing | 10/20/2009 |
Q: Write a function whose graph Y=x(to the third) reflected about the x-axis and the y-axis..
A: The function is y = x^(1/3). To reflect about the x-axis, take the negative of the function. The ...
|
| college algebra | 10/20/2009 |
Q: investing money. mr. and mrs jackson invested some money at 6% simple interest and some money at 10% ...
A: I will assume that both rates are paid yearly. Lets say that X was invested at 6%. This says that ...
|
| Formula Rearranging | 10/19/2009 |
Q: : ) So I'm a little stuck on what to do after a step. I don't expand the brackets, but if you could ...
A: This first note is about [subject = y] w = a(mx - by) This is not right: w/a = mx - by; ...
|
| how do solve these problems | 10/19/2009 |
Q: how do you solve these problems using the substitution and elimination method,...the problems are ...
A: Take the equations 2x+y=13 and 5x-2y=1. Solve the 1st for y, giving y=13-2x. Put that in the 2nd, ...
|
| Help Me please | 10/18/2009 |
Q: In triangle ABC, a = 5, b = 9, and c = 6. Find angle A, angle B, and angle C. Express the trig ratio ...
A: I used one of the law of cosines: Given a triangle with sides a, b, c and opposite angles A, B, C, ...
|
| Algebra 2/Trig | 10/18/2009 |
Q: Express the following equation is simplest form: 36-x^2/x^2+8x+12 / x^2-6x/x-2
A: Taking that as written, * and / are always done first. This gives 36 - x²/x² + 8x + 12/x² - 6x/x - ...
|
| I don't understand quads | 10/16/2009 |
Q: 1. Suppose you are an event coordinator for a large performance theater. One of the hottest new ...
A: Note: if I get too busy on some day, I wouldn't answer this. However, I have less than half a dozen ...
|
| I am trying to understand... | 10/16/2009 |
Q: Pay attention to the units of measure. You may have to convert from feet to miles several times in ...
A: Now I didn't have very many questions, so I answered this. However, if I get busy, I tend to reject ...
|
| proof | 10/16/2009 |
Q: could you plz give me a hint about the problem below: Use induction on the size of S to show that ...
A: Take S as (2,3,4). |S| = √(2²+3²+4²) = √(4+9+16) = √29. S^2 = 29, so |S^2| = 29. ...
|
| Algebra Fractional Coefficients w/ multistep equate | 10/16/2009 |
Q: 4m/5 + 2m/3 = 5 Thank you
A: Take 4m/5 + 2m/3 = 5 and multiply by 3 and 5, so multiply by 15. That is, 15*4m/5 + 15*2m/3 = 5*15. ...
|
| algebra | 10/15/2009 |
Q: When a number is added to 4 times itself the result is 16 more than the number?
A: When a number is added to 4 times the number, that is the same as n + 4n = 5n. The result is 16 ...
|
| Real Number | 10/15/2009 |
Q: Let n ≥ 2 be an integer and let x1, x2, ......., xn ∈ {−1, 1} such that x1x2 + ...
A: If xi is an element of {-1,1}, then let n be 2. The results are x1 x2 x1•x2 + x3•x1 1 -1 -1 + -1 ...
|
| algebra | 10/15/2009 |
Q: Rewrite with rational exponents: (sqrt5mn)^7 is the answer 5mn^7
A: The answer to (sqrt5mn)^7 is √(5mn)^7 = 5³m³n³√(5mn) = 125m³n³√(5mn) since the ...
|
| algebra | 10/15/2009 |
Q: I am supposed to simplify by factoring: index number is 3 sqrt radicand is 270 * t^8 Is it the ...
A: Do you mean the cube root of (270t^8)? I'll go with this one. Cube root of 27 is 3 since 3*3*3=27. ...
|
| algebra | 10/15/2009 |
Q: Please help me understand how to answer this question. 2=10+Z/-3
A: There are two ways to read this. If it were 2 = 10 + Z/-3, I'd take the 2nd way. Since there are no ...
|
| Finding domain. | 10/14/2009 |
Q: An open box is to be made from a flat piece of material 11 inches long and 6 inches wide by cutting ...
A: The domain is what values of x are possible. The problem is right: nothing needs to be done. Not ...
|
| math | 10/14/2009 |
Q: A single person takes 6 minutes to fill a bottle. If from 11 a.m. to 12.30a.m. ,1845 bottles are to ...
A: A single person takes 6 minutes to fill a bottle. 11:00am to 12:30am is really 13.5 hours, since ...
|
| math | 10/14/2009 |
Q: Mr. Merrill has 3 times as many nickels as dimes. The coins have a total value of $1.50. How many ...
A: Let D = # of dimes. The number of nickels is 3D. This means the total of having 1 dime would found ...
|
| algebra-sqare roots | 10/13/2009 |
Q: I am supposed to add and simplify by collecting like radical terms. sqrt 5a + 7 sqrt 45a^3
A: For √(45a^3), that can be split up so that it is √9√5√a²√a. This can ...
|
| algebra | 10/13/2009 |
Q: If x^2+y^2+z^2=41056 what is x+y+z
A: The four ways that I found to do it are 12 40 60 76 84 84 60 84 184 180 184 168 In the row below in ...
|
| algebra | 10/13/2009 |
Q: Twelve year old Aaron bought old bikes at an auction for $350. He fixed them and sold them for $50 ...
A: Total cost is 350 + 50N, where N is the number of bikes. Selling them gives him $62,000. He sold ...
|
| math | 10/12/2009 |
Q: 12 men and 18 boys working 15/2 hours a day can do a certain work in 60 days.if 1 man works equal to ...
A: Since 1 man = 2 boys, we had the equivalant of 12 + 18/2 = 12 + 9 = 21 men. It took a total time of ...
|
| I want to make sure I am on the right track... | 10/12/2009 |
Q: The Environment Environmental and wildlife preservation ensures future generations will have ...
A: 1. The cost, in millions of dollars, to remove x % of pollution in a lake is modeled by C = ...
|
| college algebra | 10/12/2009 |
Q: 1. simplify 3 square root 3 +2 square root 8? 2. simplify 1/x + 4/x^2 - 4 - 2/x^2 - 2x 3. ...
A: 1. 3√3 + 2√8 = 3√3 + 2√4√2 = 3√3 + 2*2√2 = 3√3 + ...
|
| Math problem | 10/8/2009 |
Q: Steve recent retiree, requires $5000 per year in extra in. He has $70,000 to invest and can invest ...
A: Bonds at at 8% and CD's are at 5%. The required income is $5,000. He has $70,000. Take the the ...
|
| math | 10/8/2009 |
Q: 8x-4=12+x just need to know how to get the answer and how to make sure if the answer is correct
A: Take 8x - 4 = 12 + x and subtract x from both sides. The result is 7x - 4 = 12. Now take 4 and add ...
|
| math | 10/8/2009 |
Q: If a +1/a=3 then a^3 +1/a^3 = ?
A: If a + 1/a = 3, then a² + 1 = 3a, so a² - 3a + 1 = 0. a is found by the quadratic equation as ...
|
| problem solving | 10/8/2009 |
Q: an 8 year old boy named Nathan wants to compare his age with that of his mother and grandfather. ...
A: a) I'll say that the boy is B, the mother is M, and the grandfather is G. The equations we are given ...
|
| problem solving | 10/8/2009 |
Q: use ohm's law to find the amount of current that would flow in a circuit that contains a 10(v# ...
A: a) Ohm's law is in volts, ohms, and resistance. I = V/r, which are I=current, V=voltage, ...
|
| problem solving | 10/8/2009 |
Q: use ohm's law to find the amount of voltage required to cause 0.005 amps of current to flow through ...
A: You cold also put 'electiricity volts amps' in the search box and more info on the subject will ...
|
| rationalize the denominator | 10/7/2009 |
Q: Please help, I am supposed to rationalize the denominator: sq rt r -sq rt s divided by sq rt r + sq ...
A: So that is (√r - √s)/(√r + √s)? Multiply the top and bottom by (√r - ...
|
| substitution | 10/7/2009 |
Q: x + 9y = 88 2x + 8y = 86 practice problem and i cannot get it
A: Given x + 9y = 88 and 2x + 8y = 86, the first one can have 9y subtracted from both sides, giving x ...
|
| distance problem | 10/7/2009 |
Q: mark leaves the house for school walking at the rate of 4kph. after 2 hrs, Jane follows mark at a ...
A: If he is walking at 4kph, and leaves 2 hours early, he has walked 8k already. Since she walks 2k ...
|
| algebra | 10/7/2009 |
Q: A rectangle with a diagonal of length is twice as long as it is wide. What is the area of the ...
A: The length of this rectange is A and the width is X, so the area is AX. The diagonal has length 2X. ...
|
| adding square roots | 10/6/2009 |
Q: I am supposed to add and simplify by collecting like radical terms if possible: 6 sqrt 45 + 9sqrt ...
A: It is known that 45 = 3*3*5. That looks like there are 2 3's there, so √45 = ...
|
| echelon form matrices | 10/6/2009 |
Q: convert the matrix to echelon form: 1 0 1 -2 2 1 3 -4 -1 0 -1 2 4 -1 1 -1 and find the rank ...
A: To convert a matrix to row echelon form, never multiply a row by anything to replace that row. Only ...
|
| need help with slope intercept | 10/6/2009 |
Q: How do I write the equation in the slope-intercept form? 4x - 10y = 11
A: To put it in slope-intercept form, it needs to be y = mx + b. In that case, m is the slope and b is ...
|
| surface area of silo | 10/5/2009 |
Q: they gave us a formula for the surface area of a silo: S=2*pi*r*h + pi*r squared then, they said ...
A: That is the write equation, but I would put in all in Excel and use pi(). For the final result, ...
|
| linear models | 10/4/2009 |
Q: what are linear models? how do you know if an equation is a linear model? are all linear models ...
A: A linear model is when linear equations are used. If there are two variable and two unknowns, the ...
|
| unitary method | 10/4/2009 |
Q: a contractor undertakes to dig a canal 6 km long in 35 days and employed 90 men.he finds that after ...
A: Canal: 6 km long; Men: 90; Days to do it: 35. Time passed: 20 days; Canal built: 2km. How many men ...
|
| Word Problem | 10/2/2009 |
Q: A store uses twice as many five-dollar bills as ten-dollar bills. $2500 was obtained in five- and ...
A: Let the number of tens be T. The number of fives is twice this number, so it is 2T. They total of ...
|
| algebra | 10/1/2009 |
Q: The table shows the number of active red-cockaded woodpecker clusters in a part of the De Soto ...
A: Looking at the numbers, the years increment by one each time. A good way to do it would be to call ...
|
| Algebra | 10/1/2009 |
Q: Tell me EVERY STEP on how to solve Addition Equations (algebra)
A: I need to see an equation. If it is a linear equation, put all of the variables on one side and the ...
|
| intermediate algebra | 10/1/2009 |
Q: What are the steps to the elimination method
A: What the elimination method is is when you multiply both equations by most likely different ...
|
| Algebra 1 | 10/1/2009 |
Q: How would you solve this radical equation: 2x to the 4th power y to the negative 4th power z to the ...
A: Is this [(2x)^4](y^-4)(z^-3)/{[(3x)^2](y^-3))(z^4)}? Putting facors in the top makes the exponent ...
|
| Algebra! | 9/30/2009 |
Q: Peter is reading a 193-page book. He has read three pages more than one fourth of the number of ...
A: He has read N pages. He has not read 193-N pages. N - 3 = (193-N)/4, so multiply both sides by 4. ...
|
| Motion word problem | 9/30/2009 |
Q: Train A travels 12 mph slower than Train B. Train A travels 200 miles in the same time it takes ...
A: A = velocity of train A, B = vecocity of train B. A can travel 200 miles in the same time it takes B ...
|
| Converting non-linear graphs into linear | 9/29/2009 |
Q: What are the methods of converting non-linear graphs to linear one?? what is the advantage in doing ...
A: The method is called finding a best fit straight line. Count the terms and call it N. Find the sum ...
|
| algebra | 9/29/2009 |
Q: While on vacation, Talisha won a lot of tickets at two arcades on the boardwalk she was visiting. ...
A: Since I gives 12c profit and II gives 10c profit, start with 1. 10c is not divisible by 12, ...
|
| Binomial theorem | 9/29/2009 |
Q: I am wondering if you can help me solve this problem: the binomial coefficient of the the 4th term ...
A: The 1st term in each row is nC0. The 2nd term in each row is nC1. The 3rd term in each row is nC2. ...
|
| substitution | 9/29/2009 |
Q: solve the system using substitution. x-6y=64 9y-10x=-181
A: From the first equation, we can add 6y to both sides and get x = 64+6y. This can be substituted ...
|
| Substitution and Elinination | 9/28/2009 |
Q: Pietro needs to rent a truck for 1 day. He calls two rental companies to compare costs. Joe's garage ...
A: Let k = kilometer travelled. The costs are $80 + $0.22k and $100 + 0.12k Set 80 + 0.22k = 100 + ...
|
| algebra | 9/28/2009 |
Q: how do i solve this problem? x+2y=-1 5x-4y=16
A: I thought I just answered this? Oh yeah, here it is. I'll paste it in. The first equation can ...
|
| algebra | 9/28/2009 |
Q: What percent larger than 8 √2 is 12 √2
A: To get from 8√2 to 12√2, you can divide both by 4√2, so the problem become from ...
|
| translating and solving inequalities | 9/27/2009 |
Q: Martin is paid $200 a week plus a commision of $25 on each television she sells. How many must she ...
A: The amount she is paid is $200 + $25n, where n is the number of television sets. To make at least ...
|
| Binomial theorem | 9/26/2009 |
Q: I am wondering if you can help me solve this problem: the binomial coefficient of the the 4th term ...
A: I don't think so. I believe it is n = 8. What you are looking for is a row in which 4th term is ...
|
| Combinations | 9/25/2009 |
Q: A panel of judges is to consist of two women and five men. A list of potential judges includes five ...
A: The panel needs 2 women out of 5 choices. The answer for women is 5 choose 2, which is ...
|
| Lines | 9/25/2009 |
Q: Solve each linear system by graphing: 4x - y + 6 = 0 X + y - 1 = 0
A: Note the easiest way to graph these lines is to see where they cross the axis. The first is 4x - y = ...
|
| restrictions in solving equations | 9/24/2009 |
Q: I am having a hard time understanding why the denominator or numberator being 0 would be a ...
A: numerator=0, denominator<>0 ---------------------------------------------- If the problem were x/y, ...
|
| unit rates and proportions | 9/24/2009 |
Q: im in eighth grade and im having trouble understanding unit rates and proportions. Can you help ...
A: Rates ---------- The speed of an item is the rate at which it travles. Speed is in feet/sec, ...
|
| algebra, graphing functions | 9/24/2009 |
Q: How to explain why and correct terminology to use in explaining how to graph transition of y= sq ...
A: It is shifted to the right since where x=3, it is like wherex=0 for the √x. Put x=3 in the ...
|
| Algebra | 9/24/2009 |
Q: The perimeter of a rectangle is 36yd. The width is 18 yd less than twice the length. Find the length ...
A: Give a rectangle length L and width W. Using this, the perimiter of a rectangle is 2L + 2W. We are ...
|
| Domain Of A Function | 9/24/2009 |
Q: How do you find the domain of a function? Please keep in mind that I'm only in Algebra and complex ...
A: The domain is all x that can be put in the function. Examples: y = x²; domain is all x, or ...
|
| objective functions | 9/22/2009 |
Q: Can you please help me set this up? Craft stores can make a fancy cloth in 2.5 hours and a casual ...
A: This is what you don't need to read, and if you want, skip after the double line. ...
|
| Probability | 9/21/2009 |
Q: First of all, thank you for your time. I'm trying to follow my class notes on this, but none of them ...
A: By AnB, I mean "A intersect B". The entire set has the first one as H or T and the second one as ...
|
| Hi I have a really hard factoring question | 9/21/2009 |
Q: I just failed a math test and need to know 18x^2 - 25x - 3 factored
A: The factors look like they need the quadratic equation to be found. Here, a=18, b=-25, and c=-3. ...
|
| Probability | 9/21/2009 |
Q: In a clinical trial, a drug used to reduce fever caused side effects in 3% of the patients who took ...
A: Given that both of the patients had the drug, they each had a 3% chance of side effects. The ...
|
| algebra | 9/21/2009 |
Q: 6x +5y=7 x-y=3 using substitution
A: Looking at the second equation, that can easily be solved for x. That is done by adding y to both ...
|
| Algebra | 9/21/2009 |
Q: Without graphing, how can you tell if the following three points make the vertices of a right ...
A: The only way that three points can't make a triangle is if they are all in a row. Looking at points ...
|
| Marble Problem | 9/16/2009 |
Q: I'm in seventh grade, and I need a little help. This question is in my pre-algebra book: The marble ...
A: Even numbers always end in 0, 2, 4, 6, or 8. This says the Emporium selss bags of marble, but it ...
|
| algebra | 9/16/2009 |
Q: Charles wants to build a vegetable garden such that three sides of the garden are fenced and the ...
A: The field has width of W and length of L. The area is A = WL. We also know that 2W + L = 30, we L ...
|
| radical form? | 9/15/2009 |
Q: i need help with radical form questions (writing in radical form) 1. x^2/3y^1/3 2. x^3/5y^4/5 ...
A: 1. x^2/3y^1/3 I will assume that one is x^2/(3y^(1/3)). Multiply the top and bottom by y^(2/3) and ...
|
| exponential form? | 9/15/2009 |
Q: 1. ^3sqrtA 2. ^7sqrtA^2*B^4 and the other question asks the difference between -sqrt4 and sqrt4? ...
A: 1. Usually ^ follows a number. For example, '2^3' means '2 cubed', or 2*2*2 = 8. 3^4 = 3*3*3*3 = ...
|
| Help | 9/15/2009 |
Q: I need help with a few questions. 1. If c^2=d, then c is the (need to enter word) of d 2. another ...
A: 1. c^2 is known c squared = c*c. The oppositve of ^2 is ^(1/2), or the opposite of square is ...
|
| algebra word problems | 9/14/2009 |
Q: The lenght of a rectangle is 7inches grater than its width. the perimeter of the rectangle is ...
A: Rectangle ------------------ Call L the length and W the width. We know that L=W+7. The perimeter ...
|
| Simplifying..... with square roots? | 9/14/2009 |
Q: Wilson, I seem to have hit a speed bump in algebra. It involves square roots. Its states to ...
A: The square root of a*a is a. The square root is also sqrt or √. It is good to know that ...
|
| Solve in Simplest Radical form? | 9/14/2009 |
Q: I need help trying to figure out some algebra questions. It says solve the following, express your ...
A: It is known that sqrt(a*a) = √(a*a) = a and a² = a*a. 1. √(1/121) = 1/√121 = ...
|
| algebra | 9/13/2009 |
Q: A driver travels 12 miles to work at a constant speed and travels the same distance home also at a ...
A: Delmy Country: United States Category: Algebra Private: No Subject: algebraA driver travels 12 miles ...
|
| highschool algebra II. | 9/12/2009 |
Q: Solve. 2k+5(-9k-5)=24+6k
A: Take 2k+5(-9k-5)=24+6k and multiply out what is in the parenthesis. The result should be 2k -45k - ...
|
| unitary method | 9/12/2009 |
Q: 95 men had provisions for 200 days.After 5 days 30 men died due to an epidemic.The remaining food ...
A: If 95 men had provisions for 200 days, that meants they had 200*95 days of food. 200*95 is 19,000. ...
|
| algebra word problems | 9/11/2009 |
Q: an ultra light aircraft flies to a nearby town that is 20 miles away in 2/5hour with a tail wind. It ...
A: 1. Let S=speed of plane, W=wind speed, D=distance, T1=time, T2=time, R1=rate, and R2=rate. This ...
|
| Algebra | 9/11/2009 |
Q: What is the slope of the line passing through points A (5,4) and B(0,3)?
A: The slope of a line is rise/run. The rise is the difference in y values and the run is the ...
|
| unitary method | 9/11/2009 |
Q: If 9 examiners can examine a certain number of answer books in 12days by working 5 hours a day;for ...
A: If 9 examiners, 12 days, 5 hours a day, is 9 people for 60 hours, is 540; 4*30*x = 2(540). 120x = ...
|
| distributing fractions in a linear equation | 9/11/2009 |
Q: -1/6(x-18)+1/3(x+3)=x+34 How do i get rid of the fraction and how do I distribute it?
A: I will assume that the equation does not have the polynoimials in the denominator, i.e., it can ...
|
| math tutor | 9/10/2009 |
Q: I am trying to help tutor my son through his math class. Here is the question. If you can get me ...
A: The first point is (-1,2) and I will call it (x1,y1). The second point is (3,1) and I will call it ...
|
| unitary method | 9/10/2009 |
Q: If 9 examiners can examine a certain number of answer books in 12days by working 5 hours a day;for ...
A: There are 9 examiners. The time worked by each of them is 12*5 = 60 hours. The total hours would ...
|
| Speed, time and distance algebra | 9/10/2009 |
Q: A man travels 108km at a constant speed and finds he could have made the journey 4.5 hours shorter ...
A: If he had gones at 6kph, it would be 18 hours. If he had gone two faster, at 8kph, it would have ...
|
| solving equations for x | 9/10/2009 |
Q: i have had a complete brain lapse, i am doing an algebra review in my trigonometry class and i can't ...
A: The first thing to do is to subtract 6 from both sides, so we have an equation equal to 0. That ...
|
| factoring | 9/9/2009 |
Q: how do i factor this: 24x^3y-8x^y
A: The numbers are 24 and 8. That factors of 24 are 3*2*2*2 and the factors of 8 are 2*2*2. It can be ...
|
| Polynomials | 9/9/2009 |
Q: I've already taken Algebra 1 and now I'm in the second course...however I don't understand ANYTHING! ...
A: Polynomials are a set of numbers to a power. Explanantion of powers: 3x + 1 is 3*x, +1. 4x² + 5x + ...
|
| Ratio, proportion, unit rate, percent. 7 questions | 9/9/2009 |
Q: 1.Represent the ratio as a unit rate. $2.40 for 15 ounces of popcorn 2.$47.25 for 35 disks 3. Which ...
A: c is used after money, ie 10c=10cents 1.Represent the ratio as a unit rate. $2.40 for 15 ounces of ...
|
| problem solving (applications to linear equations) | 9/9/2009 |
Q: 1) Josie can eat a big pizza pie alone in twenty two minutes while Christy can eat a pizza of that ...
A: It takes Jose 22 minutes and Christy 16 minutes. After 1 minutes, Jose would have eatern 1/22 of ...
|
| algebra | 9/8/2009 |
Q: what is 3% of $24,590.00
A: 3% is the same as 3 parts out of 100 parts. This means we multiply by 0.01 and then multiply by 3 to ...
|
| unitary method | 9/8/2009 |
Q: If 7 needlewomen can finish a piece of work in 10 5/8 days of 9 3/5 hours each,how long will it take ...
A: Note that 1/8 = 0.125, so 5/8 = 0.625. Also note the 1/5 = 0.2, so 3/5 is 0.6. We have 7 N, N for ...
|
| unitary method | 9/7/2009 |
Q: If 70 men dig 1 hectare 500 sq.m in 5 days,how many men will dig 2 1/4 hectares in 25 days. ANSWER: ...
A: kMD=H where k is a constant, M is for men, D is for days, and H is for hectares. Note that at first, ...
|
| unitary method | 9/6/2009 |
Q: If 70 men dig 1 hectare 500 sq.m in 5 days,how many men will dig 2 1/4 hectares in 25 days.
A: The time of the 1st one is 5 days, the time of the 2nd one is 25 days. This means we only need 5/25 ...
|
| How to solve fraction inequalities | 9/5/2009 |
Q: The equation is as follows: (x/2)-(5/2) < (x/3)+1 I am clear about getting like terms on each side ...
A: First the denominator needs to be looked at. There terms in the denominator are 2, 2, and 3. The 1 ...
|
| refresher so i can help my daughter | 9/4/2009 |
Q: how to solve this? (3x-16) + (4x-8) = 60
A: The parenthesis can be dropped since both of them are added. The result is 3x - 16 + 4x - 8 = 60. ...
|
| ECN Algebra, YUCK! | 9/2/2009 |
Q: If Amy Spends her entire allowance she can afford 6 candy bars and 6 comic books a week. She could ...
A: The price of candy bars is 40 cents. That means that 6 candy bars is $2.40 and 10 candy bars is $4. ...
|
