| Subject | Date Asked |
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| algebra 2 | 11/16/2009 |
Q: Given: root 3 and 5-2i are roots of the equation x^5-9x^4+16x^3+56x^2-117x-87=0. Find the other 3 ...
A: You havent done anything wrong (except maybe making a mistake in the presentation of the ...
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| Simultaneous equations | 11/15/2009 |
Q: Ahmed At the tender age of 48 I have decided to do a foundation degree in engineering and have ...
A: 1) Let the number of 50p coins be x and those of 20p coins be y 50p in x places + 20p in y places = ...
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| Precalculus | 11/13/2009 |
Q: I need help solving this 6 part math problem. The problem is stated as the following: Find the exact ...
A: In quadrant II, sin u and sin v are positive but all of cos u, cos v, tan u and tan v are negative. ...
|
| Utilization | 11/12/2009 |
Q: Dont know if this is the right forum for this. I have a perplexing problem for which I believe only ...
A: 1) Yes, your calculation is correct. 2) Well, there is definitely a flaw in the assumption that ...
|
| calculus | 11/10/2009 |
Q: solve for x. log6(x+2) + log6(x-1)=3 how do you do i solve for x?
A: I'm taking the 6 to be the base of logarithm here. logA + logB = logAB So, log6 (x+2) + log6 (x-1) = ...
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| Pre-Calculus | 11/8/2009 |
Q: I need help with this project, please: Given that tan theta = 2/3 for an angle Theta in Quadrant ...
A: If θ is in the third quadrant, tanθ is positive and both sinθ and cosθ are ...
|
| Algebra II.....please help me its urgent!!! | 11/7/2009 |
Q: 21. Find values of a and k for a parabola containing the points given: y - k = a(x + 3)^2; (-5,1) ...
A: 21) y - k = a(x + 3)² At (-5,1) 1 - k = a(-5 + 3)² = a(-2)² = 4a k = 1 - 4a At (1,7) 7 - ...
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| solve for x | 11/4/2009 |
Q: 27^x^2 > 9^x^3
A: 27^x² > 9^x³ (3^3)^x² > (3^2)^x³ 3^(3x²) > 3^(2x³) Now, 3x² > 2x³ 3x² - 2x³ > 0 x²(3x - 2) > 0 ...
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| Trig | 11/1/2009 |
Q: I need help with this problem, please: Find the center, vertices, and foci of the ellipse whose ...
A: Re-arranging the equation by completing the square in y, 9x² + y² + 10y + 16 = 0 9x² + (y² + 10y + ...
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| exponential equation to linear equation | 11/1/2009 |
Q: Data below is of radioactive decay of a material x Time t min y Count rate N cps ( counts per second ...
A: To get the half-life you simply use the equation N = No.e^(-αt) If T is the half-life, then t = ...
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| Prove Identies (Trig) | 10/31/2009 |
Q: I've trying to prove these identities (I'm stuck). See attachment "d" & "e"
A: d)First, you need to remember the basic identities sin²x + cos²x = 1 sin(x+y) = sinx.cosy + ...
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| exponential equation to linear equation | 10/31/2009 |
Q: Data below is of radioactive decay of a material x Time t min y Count rate N cps ( counts per second ...
A: Well, the new table of values is just one that contains values of lnN and Time t(just as before). In ...
|
| Trig | 10/27/2009 |
Q: I need help with this problem, please! For each of the triangles ABC, information is provided. ...
A: a)This triangle has two sides and an angle given. So i take it to be SAS, if i understand your ...
|
| Trigonometry | 10/24/2009 |
Q: I need help with this problem, please: Solve the equation: sin x - 2 sin x cos^2 x = 0, finding all ...
A: sinx - 2sinx.cos²x = 0 sinx(1 - 2cos²x) = 0 So, either sinx = 0 or 1 - 2cos²x = 0 For sinx = 0 x = ...
|
| Pre-cal | 10/14/2009 |
Q: I have a problem here and its asking to write the following trigonometric expression in terms of ...
A: Lets start with the identity cos²x + sin²x = 1 which i believe you should no doubt know if you're ...
|
| circle formulae | 10/12/2009 |
Q: Hey, I'm in first year calculus in university and it seems my prof expects us to know the xy formula ...
A: The general equation of a circle with center (a,b) and radius r is (x-a)² + (y-b)² = r² For the ...
|
| Advanced Algebra | 10/11/2009 |
Q: 18xsquared+19=39x
A: For ax² + bx + c = 0 x = [-b ± √(b² - 4ac)] / 2a So 18x² - 39x + 19 = 0 x = [39 ± ...
|
| Vectors | 10/10/2009 |
Q: I'm a guy from India and have passed out high school this year but currently I have taken a year off ...
A: Yes, a coplanar vector to b and c is the vector r = b + xc Now, lets go by your suggestion, which ...
|
| Trigonometry | 10/5/2009 |
Q: Explain why the period of y = tan(theta) and y = cot(theta) functions is only 180 degrees instead of ...
A: It's all a property of the function itself. If T is the period of the function tanx, then tanx = ...
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| Algebra | 10/4/2009 |
Q: Max lives on a river, 30 miles from town. Max travels downstream (with the current) at 20mph. ...
A: Its quite straightforward. 30 miles to town at 20mph means a time of 30/20 = 1.5 hours 30 miles back ...
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| modulus function | 10/1/2009 |
Q: what is |2x+1|-|x-3|=10
A: |2x+1| - |x-3| = 10 The easy way to do this is to consider the points where the arguments (in the ...
|
| Math | 9/30/2009 |
Q: how do I arrive to the answer for this question 3x+7y+2x+4y+7x+3y
A: You havent exactly stated what you're trying to find. But if you want to simplify the expression, ...
|
| Trigo | 9/26/2009 |
Q: Prove that secA(1-sinA)(secA+tanA) = 1
A: First, you need remember the identities; secA = 1/cosA tanA = sinA/cosA or sinA.secA sec²A = 1 + ...
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| Fractional indices :O | 9/24/2009 |
Q: can you help me do.. (x to the power of 1/2 +2)(x to the power of negative 1/2 - 3) ?
A: I hope you meant [x^(1/2 + 2)].[x^(-1/2 - 3)] First, 1/2 + 2 = 1/2 + 4/2 = (1+4)/2 = 5/2 and -1/2 - ...
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| Math | 9/24/2009 |
Q: Show that: tan(tan^-1 1/3 + tan^-1 1/7)= 1/2
A: From the double-angle formula for tangent, tan(A+B) = (tanA + tanB)/(1 - tanA.tanB) Now, let A = ...
|
| trig | 9/14/2009 |
Q: On a graph of y = cos(Ax) + B, points P and Q are consecutive lowest and highest points. Find the ...
A: The graph of y = cos(Ax) + B is simply the graph of y = cos(Ax) moved up B units and has a period of ...
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| math | 9/10/2009 |
Q: prove that (sinA.sin2A+sin3A.sinA6A)/(sinA.cos2A+sin3A.cos6A)=5tanA ...
A: I think it was meant to be (2.sinA.sin2A + 2.sin3A.sin6A)/(2.sinA.cos2A + 2.sin3A.cos6A) i.e ...
|
| math | 9/7/2009 |
Q: a six digit number which the first digit is one more than the third, the second digit is one less ...
A: Are you trying to find one of such numbers? If so, then let a,b,c,d,e,f be the digits of the number ...
|
| math | 9/6/2009 |
Q: sin(2A)=2sinA cosA =(2sinA cos^2A)/cosA =2tanA/sec^2A =2tanA/1+tan^2A please explain it ...
A: In algebra when you're multiplying and dividing a series of expressions it doesnt really matter what ...
|
| pre-calculus | 9/6/2009 |
Q: How would i complete the square to find the center and the radius of the circle: ...
A: A circle with center (a,b) and radius r has the equation (x-a)² + (y-b)² = r² For the circle 3x² + ...
|
| math | 9/5/2009 |
Q: sin(2A)=2sinA cosA =(2sinA cos^2A)/cosA =2tanA/sec^2A =2tanA/1+tan^2A please explain it
A: First, you need to know the identities sinA/cosA = tanA sin(A+B) = sinA.cosB + sinB.cosA 1/cosA = ...
|
| Revenue Functions | 9/3/2009 |
Q: I have no ideaa how to do this so ill show u everything!! 6. You decide to sell the sandwiches for ...
A: You've provided scarce information but i'll do what i can. 7. Yes, the revenue function would be R = ...
|
| law of sines | 9/2/2009 |
Q: having trouble understanding the steps to solve each triangle. here is a couple of my problems if ...
A: You need to always remember that the sum of the angles in a triangle equals 180 degrees. 1) B = 42°, ...
|
| trigonometry | 8/26/2009 |
Q: how do I proceed? tan(-6pi) + cos(9pi/4)
A: First, some useful things to remember sin(-x) = -sinx cos(-x) = cosx tan(-x) = -tanx and in ...
|
| motion | 8/26/2009 |
Q: the runner continue to run 6m/s until the end of the race. after crossing the finish line the runner ...
A: Here, we use the equation of motion v = u + at where v is the final velocity u is the initial ...
|
| moments mechanics 2 for A2 | 8/23/2009 |
Q: when you take moments how do you know if it's clockwise or anticlosewise moment. How can determine ...
A: The moment is clockwise if the force is directed downwards and the pivot (the point about which ...
|
| trig | 8/13/2009 |
Q: Express the length d of a squares diagonal as a funtion of its side length
A: The triangle containing the diagonal of a square and two of its sides is a right-angle triangle, ...
|
| trigonometry | 8/7/2009 |
Q: how to prove that 2tanA+cotA=cscAsecA
A: 2tanA + cotA = 2tanA + 1/tanA = (2tan²A + 1)/tanA = (tan²A + tan²A + ...
|
| maths | 8/2/2009 |
Q: can you please help me find a closed form for the sequence given by the recurrence syatem, giving ...
A: Lets consider the general form A(n+1) = a.A(n) + b with A(0) = p Now, A(1) = a.A(0) + b = ap + ...
|
| modulus | 7/23/2009 |
Q: I got this information from an A level book. It says that " we can square both sides for |2x-3|<x+1 ...
A: First, you have to remember that |2x-3| is a positive quantity. In the first case it is less than ...
|
| Proving Identities | 7/2/2009 |
Q: prove following identity: (1+tanx)/(1+cotx)=(secx)/(cscx)
A: First remember that; cotx = 1/tanx secx = 1/cosx cscx = 1/sinx and tanx = sinx/cosx Now, 1 + cotx = ...
|
| Volume calculations | 6/26/2009 |
Q: Salami I want to make a mixing drum with a volumetric capacity of 9 cu.ft. I found that the formula ...
A: You need to realise that the conversion for a cylinder is done exactly as you would for a cube. ...
|
| area of a curve | 6/3/2009 |
Q: the region R is a quadrant, is bounded by y=x^2, the y axis, and the line y=2. where R is rotated ...
A: The volume of solid formed when the area bounded by the curve y = f(x) is rotated about the y axis ...
|
| Calculus Problem | 6/3/2009 |
Q: I was just wondering if you could help me find the solution to this problem: For each x in the ...
A: Ok, so let's see if i can help. (0,0) is the origin and the point (x,0) lies on the x axis at a ...
|
| percentage | 5/27/2009 |
Q: On a purchase of $120, a store offered a payment plan consisting of a $20 down payment and 12 ...
A: The total amount paid = 20 + 12x10 = 20 + 120 = $140 ...
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| math | 5/17/2009 |
Q: How do you write the positive square root of a number as a length of a side of a square with a given ...
A: A square with sides of length l has an area A where A = l² Taking square roots of both sides ...
|
| math | 5/16/2009 |
Q: Find the lowest common multiple of 2x^4-2x^2y^2,4x^5+8x^4y+4x^3y^2,and 6x^2+6xy
A: We factorize all the expressions, 2x^4 - 2x^2y^2 = 2x^2(x^2 - y^2) = 2x^2.(x-y).(x+y) ...
|
| math | 5/13/2009 |
Q: Remove the grouping symbols and simplify the following expression: x-{2y-[3z+(5x-3y)+z]}
A: x - {2y - [3z + (5x-3y)+ z]} = x - {2y - [3z + 5x - 3y + z]} = x - {2y ...
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| units and measurements-please check my answers? | 5/13/2009 |
Q: The following data resulted from measurements on a rectangle: width = 28 ± 0.5 cm, breadth = 33 ± ...
A: The area, A = wb The relative error of A, ΔA is gotten using average errors from ΔA/A = ...
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| arithmetic-word problem | 5/6/2009 |
Q: The water from one outlet, flowing at a constant rate, can fill a swimming pool in 9 hrs.The water ...
A: In one hour, first outlet fills 1/9 of the pool and second outlet fills 1/5 of the pool. This means ...
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| Precalculus | 4/30/2009 |
Q: sin^-1(square root of 5 over 3)
A: You havent actually stated what you want but if you want the value of the arcsin of a number you'd ...
|
| transpose and calculation | 4/30/2009 |
Q: the volume v of a conical solid, radius r th subject of the formula. V=1/3 pie r squared h, ...
A: The formula V = (1/3)#r^2.h (where # represents pi) gives the value of the volume given the values ...
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| having problems | 4/28/2009 |
Q: Salami, can you please take a look at the attach file. I not quite sure how to get to my answer.I ...
A: Considering the left triangle we see that the two perpendicular sides have lengths 4mm (because they ...
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| probability question | 4/27/2009 |
Q: Bucket A contains three different colored balls: one red, one blue, and one white. Bucket B ...
A: The probability of picking a red ball in the first bucket, assuming identical balls P(red.first ...
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| modulus | 4/26/2009 |
Q: solve: |x+2|>2x
A: |x+2| > 2x First, you have to realise that |x+2| is always positive i.e it is positive for every ...
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| problem with averages question | 4/24/2009 |
Q: I have a problem with a maths homework question. If you know the average duration (in days) a large ...
A: Sorry for the delay. The formula would be incorrect like you suggested. To get the average daily ...
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| pre-cal vectors | 4/24/2009 |
Q: An SUV weighing 4600 pounds is parked on a street which has an incline of 20 degrees. Find the ...
A: The magnitude of the forces required to keep the SUV from rolling down the hill and that ...
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| ma | 4/21/2009 |
Q: Hey Mr. Salami I need help with this maximum and minimum word problem. I appreciate your time. A ...
A: Starting from the present day, we find the revenue function. Suppose he waits for x days, the honey ...
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| Algebra problem | 4/21/2009 |
Q: Over what interval of x is the function, y=0.3x^4-2x^2+0.5-4 increasing? Write in interval notation. ...
A: The 0's in your equation are confusing. Could you restate clearly and send again? Anyway, a function ...
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| how many | 4/18/2009 |
Q: 3. Let X = {1, 2, 3, ..., 1000}. Find the number of 3-element subsets {a, b, c} of X such that the ...
A: The total number of 3-element subsets is 1000C3 (read '1000 combination 3') i.e the number of ways ...
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| Trigonometry Identities | 4/17/2009 |
Q: Hey I have some questions to find the exact values, I'm not sure about the steps involved. Could you ...
A: You have to make use of the double angle formulas here. sin(A + B) = sinA.cosB + sinB.cosA sin(A - ...
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| discrete mathematics | 4/17/2009 |
Q: Can you help me figure this out? I need to prove or disprove the following? (A intersection B) - (A ...
A: I'll rewrite both statements as (A n B) - (A n C) and A n (B-C) Now, to define set difference X - Y ...
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| Algebra | 4/10/2009 |
Q: On the response given in the problem of Bob Rodriquez who is trying to get to NY and trying to ...
A: For a 156-mile trip, moving at 80 miles/hr results in spending 156/80 hrs = 39/20 hrs we've divided ...
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| trigonometry proving | 4/7/2009 |
Q: sin^4(a)+cos^4(a)=1-2sin^2(a)cos^2(a)
A: sin^2(a) + cos^2(a) = 1 (an identity) therefore, sqyaring both sides [sin^2(a) + cos^2(a)]^2 = 1 ...
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| oredered pair | 4/3/2009 |
Q: if x^2 - 5x + 7 = 0, x^3 = ax + b, where a and b are integers. compute the ordered pair (a,b)?
A: If x^2 - 5x + 7 = 0 x^2 = 5x - 7 multiplying through by x x^3 = 5x^2 - 7x x^3 = (5x)x + (-7x) ...
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| confusion | 3/29/2009 |
Q: 1- If I do postgraduates in mathematics , will I expose to " matlab " software on my studies of ...
A: I'm sorry i cant be of much help here. But i'll tell you this, getting any kind of degree in ...
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| 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: Did you mean s = 3t^3/2 - t^1/2 + 3t -12 ? If so, the velocity and acceleration functions are ...
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| critical turning points | 3/10/2009 |
Q: find and clasify the critical turnung points of f(x)=cosx+sinx for 0 is less then x and less then ...
A: The volume of the cone is the definite integral of #y^2 dx from x = 0 to x = 4, where # represents ...
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| critical turning points | 3/7/2009 |
Q: find and clasify the critical turnung points of f(x)=cosx+sinx for 0 is less then x and less then ...
A: The curves are y = x^2 and y = sqrtx They intercept where x^2 = sqrtx i.e x = 0 and x = 1 The area ...
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| critical turning points | 2/28/2009 |
Q: find and clasify the critical turnung points of f(x)=cosx+sinx for 0 is less then x and less then ...
A: Turning points occur when f'(x) = 0, to classify them we check the value of f''(x). f''(x) > 0 ...
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| Mathdmatical induction | 2/17/2009 |
Q: Show by mathematical induction that 1/(n+1) + 1/(n+2) + ... + 1/2n > 1/2
A: Let the series be T(n) = 1/(n+1) + 1/(n+2) + ... + 1/2n By mathematical induction, we have to show ...
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| angle of elevation | 2/16/2009 |
Q: Two observers are 500 feet apart. Each measures the angle of elevation of a hot air balloon that ...
A: I've provided no diagram here and so you would have to visualize the situation. Let the balloon be a ...
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| geometric series | 2/15/2009 |
Q: Please help me.. A geometric series has third term 27 and sixth term 8. -Show that the common ratio ...
A: The nth term of a geometric series is T(n) = ar^(n-1) where a is the first term and r is the common ...
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| Logarithms | 2/10/2009 |
Q: A clear picture of the questions has been attatched. Please could you answer 11a and 11b and ...
A: a)let log4 3 = k, then 4^k = 3 (2^2)^k = 3 2^(2k) = 3 taking square roots, 2^k = sqrt3 and so, log2 ...
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| how to work this out | 1/27/2009 |
Q: root of 3 * sinx = cosx ...
A: (cosx)^2 + (sinx)^2 = 1 cosx = sqrt[1 - (sinx)^2] So, sqrt3.sinx = cosx sqrt3.sinx = sqrt[1 - ...
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| Iteration | 1/23/2009 |
Q: I'm dont know how to apply the formula & i'm lack of examples from my teacher & textbooks so i'm ...
A: The iterative formula states, X(r+1) = 0.5[Xr + N/(Xr)^2] This means that for every of Xr ...
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| Coordinate geometry question | 1/22/2009 |
Q: This is in regard to your reply at: ...
A: As you would have seen, the length of the line segment is 190.39 and not 255 like you stated. Now, ...
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| Trig and Precalculus | 1/14/2009 |
Q: Im having a severe getting this problem correct none of my answers match the answers given. Solve ...
A: I'm guessing you meant to write 4x^2 - 8x - 48 = 0 and not 4x^2 - 8x^2 - 48 = 0 !!! Ok then, 4x^2 - ...
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| straight graph line | 12/15/2008 |
Q: in the following y is the dependent variable & x is the independent. a&b are constants what type ...
A: 1)y = ax Plot y against x 2)1/y = ax + b Plot 1/y against x 3)y = (ax + b)^-1 = 1/(ax + b) 1/y ...
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| basic algebra | 12/14/2008 |
Q: A boat travels 10 mph in still water. It travels 24 miles upstream and the same distance downstream. ...
A: When traveling upstream the effective speed is less because of the speed of the current. It is more ...
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| Mathmatical Riddle? | 12/10/2008 |
Q: Asked the question with one other expert, and this was my answer:I have already answered this ...
A: Not a very clear question the way you've put it. The statement "that original sum of 30 now becomes ...
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| Mathematical methods for science 1 | 12/10/2008 |
Q: 1. Determine the volume of the solid of revolution obtained when the curve F(x) =x2+5 Is rotation ...
A: The volume of the solid of revolution obtained when f(x) is rotated about the x axis between x = a ...
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| intermediate algebra | 12/9/2008 |
Q: I am a 56 year woman re-entering college and I am having problems with these problems, please help ...
A: 1)(y - 9)/(x - 1) = (-2 - 9)/(4 - 1) (y - 9)/(x - 1) = -11/3 3(y - 9) = -11(x - 1) 3y - 27 = ...
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| math question | 12/8/2008 |
Q: The sequence of 7, 49, 343, 2401, .... continues indefinitely. 2. What is the nth term in the ...
A: The sequence is an example of a geometric sequence (where every term except for the first is gotten ...
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| Trig. | 12/8/2008 |
Q: I am currently in Grade 12, University Level Advanced Functions and need some assistance. I need to ...
A: Firstly, remember these sin2x = 2.sinx.cosx cos2x = 2cos^2(x) - 1 Now, 2(cosx.sin2x - sinx.cos2x) / ...
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| physics | 12/5/2008 |
Q: an object is moving in a circular path and covers a distance of 42250km in 24 hours. find its linear ...
A: speed = distance/time = 42250km / 24 hours = 1760.42 km/hr OR 42250 x 1000m / 24 x 60 x ...
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| Math | 12/5/2008 |
Q: Helen earns $7.50 per hour at her job, but if she works more than 35 hours in a week she is paid 1.5 ...
A: Helen gets paid $7.50 per hour during regular hours and $7.50 x 1.5 = $11.25 per hour for overtime ...
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| math | 12/3/2008 |
Q: I have this question having to do with Subsitution and Elimenation but I've tried it more than once ...
A: Let x and y represent the prices of a calculator and three-hole punch at Scholar's Choice ...
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| Geometry | 11/30/2008 |
Q: The measure of each interior angle of a regular polygon is 20 degrees more than three times the ...
A: Each interior angle of a regular polygon with n sides is (180/n)(n-2) The exterior angle to it 360/n ...
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| velocity time graph | 11/27/2008 |
Q: A hovercraft, which has a max speed of 80km per hour, makes ajourney across the English Channel, a ...
A: If the velocity-time graph has the shape of an isosceles triangle, this shows that there is constant ...
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| Discrete Mathematics | 11/18/2008 |
Q: Sets and Probability A marble is drawn from a box containing 3 yellow, 4 white, and 8 blue marbles. ...
A: The probability of drawing a white marble p = 4/(3+4+8) = 4/15 The odds of drawing a white marble ...
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| Probability, Sampling | 11/4/2008 |
Q: I pay my apologies for using short-cut language. I also thank you for replying so soon to my mail. I ...
A: 1)Applying the general formula for a confidence interval, the confidence interval for a proportion ...
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| difficult math problem! | 11/3/2008 |
Q: Find, with proof, the largest positive integer k with the following property: There exists a ...
A: For starters, N is never divisible by N-1 except when N = 2 and that clearly doesnt satisfy us ...
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| In need of help | 10/30/2008 |
Q: Mr Salami, Can you please look at the following problems and kindly provide me with the correct ...
A: I dont know what you've done so i cant tell you what you did wrong but hopefully you'll see for ...
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| Math 121 | 10/30/2008 |
Q: find f(-x) when f(x) is 2x^2-x+3
A: For f(x) = ax^n f'(x) = nax^(n-1) So, f(x) = 2x^2 - x + 3 f(x) = 2x^2 - 1x^1 + 3x^0 and f'(x) = ...
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| solving system of equations in 3 variables | 10/29/2008 |
Q: so yea i'm trying to find 3 numbers that works in all 3 equations so yea here you go ...
A: x + 2y = 12 3y - 4z = 25 x + 6y + z = 20 From the first equation, x = 12 - 2y From the second ...
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| maths statistics | 10/29/2008 |
Q: Soup is sold in tins which are filled by a machine. The actual weight of soup delivered to a tin by ...
A: Its okay, you can always ask your questions. The z statistic for any weight w is z = (w - m)/s where ...
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| Math | 10/28/2008 |
Q: A drinking glass is in the shape of a cylinder that is 60mm in diameter and 15cm tall. How many ...
A: The radius of the cylinder is r = 60mm/2 = 30mm = (30/10)cm = 3cm We do this so as to have ...
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| maths probability/statistics | 10/27/2008 |
Q: The weight of a particular variety of orange is normally distributed with a mean of 155 grams and a ...
A: The z statistic for any weight w is z = (w - m)/s where m is the mean and s is the standard ...
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| maths stats | 10/26/2008 |
Q: A steel rolling mill has two machines, A and B, for cutting steel bars. For each machine the length ...
A: The z statistic for any length x of bar is z = (x - m)/s where m is the mean and s is the standard ...
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| mathematic | 10/26/2008 |
Q: A telescope manufacturer wants its telescopes to have standard deviation in resolution to be ...
A: I'm sorry but i just noticed some numerical errors in the original solution and i've made ...
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| Math | 10/24/2008 |
Q: Construct a truth table for ~ (p v q)
A: The truth table for ~(p v q) i.e complement of (p or Q) p q (p v q) ~(p v q) 1 0 1 0 0 ...
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| math | 10/23/2008 |
Q: Simon is covering a wall with equal size tiles that cannot be cut into smaller pieces. The wall is ...
A: By simple reasoning. If the tiles have length l(inches) and are arranged in quantity x horizontally ...
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| Discrete Mathematics | 10/22/2008 |
Q: Chapter 6- Systems of Linear Equations and Matrices Use the Gauss-Jordan method to solve the ...
A: 2x + 3y + z = 9 4x + y - 3z = -7 6x + 2y - 4z = -8 The set of equations is written in matrix form ...
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| mathematics | 10/22/2008 |
Q: A central university has a student population of 60,000. the university is interested in determining ...
A: Applying the general formula for a confidence interval, the confidence interval for a proportion ...
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| statistics | 10/21/2008 |
Q: in a large locality,60% of families have a car,50% have an air conditioner and 30% have both.find ...
A: If 60% of families have a car,50% have an air conditioner and 30% have both i.e P(a&c) = 30% Then ...
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| Factoring binomials etc. | 10/21/2008 |
Q: 8b^2 - 18c^2 Next question 4x^2 - 7x + 3 Another question x^2 + 8x +16 Thank-you and please help.
A: 1)8b^2 - 18c^2 = 2(4b^2 - 9c^2) = 2{(2b)^2 - (3c)^2} using x^2 - y^2 = (x + y)(x - y) = 2(2b - ...
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| Probaility - College | 10/20/2008 |
Q: 74% of Martians own spaceship. 62% of the space ship owners are male and 45% of the Martians that ...
A: If 74% of Martians own spaceships and 62% of them are male, then the percentage of Martians that are ...
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| Discrete Mathematics | 10/19/2008 |
Q: Chapter 6- Systems of Linear Equations and Matrices Write the augmented matrix of the system and ...
A: The set of equations 3x - 2y - 8z = 1 9x - 6y -24z = -2 x - y + z = 1 is unfortunately ...
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| Arithmetic Series | 10/12/2008 |
Q: I am stuck with the following questions. I think you need to use simultaneous equations but I'm not ...
A: Yes, you need to use simultaneous equation. Lets find out why and how! 1). For an arithmetic series ...
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| Math Prob | 4/27/2007 |
Q: Let A={x:2<=x<=7} and B={x:|x-4|<=h},h is an element of R.Find the LARGEST value of h for which B ...
A: For |x-4| <= h Then either x-4 <= h or -(x-4) <= h The latter resulting in x-4 >= -h Combining the ...
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| gradient and y- intercept | 4/26/2007 |
Q: i wanted to see your answer for this please,and how you may re-arrange the equation to get y=mx+c, ...
A: The general form of the equation of a straight line is y = mx c where m is the gradient and c is ...
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| differentation | 4/25/2007 |
Q: 1. A rectangular plot of farmland will be bounded on one side by a river and on the other three ...
A: 1)Considering that the rectangular fence would have only three sides made of wire, two of them would ...
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| Ratios | 3/10/2006 |
Q: What simple solution, one not requiring algebra if possible, can be used to determine the missing ...
A: I'm not quite sure how true what you noticed was. Anyway, i can say that there is no specific ratio ...
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| math | 3/7/2006 |
Q: Praskova wants to obtain a short term loan for $1500.00 and pay it back in 3 months. She does not ...
A: Sorry for the time it took. The formula for simple interest is I = PRT where I is the simple ...
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| FACT (N) Excel | 3/4/2006 |
Q: I am attempting to calculate 100! and 200! and also trying to figure out what is the biggest ...
A: I'm sorry i can't determine the limit of calculation the Excel package can do for you on factorials. ...
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| Combination problem | 3/2/2006 |
Q: Suppose there are 8 different toppings that you can choose to include or leave off of his hamburger. ...
A: The number of ways of selecting r things from a group containing n is defined as nCr(read 'n ...
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| Fractions & Word Questions | 2/28/2006 |
Q: One worker can perform a certain work in 8 days, a second worker in 10 days, and a third worker in ...
A: Its a rate problem. We simply determine how much work each worker can do in a day. In a day, the ...
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| Trigonometric Graphs | 2/23/2006 |
Q: I tried to answer this question by drawing it all out, but I am not able to fully answer the ...
A: Sorry for the time it took. I'm unable to give out a diagram depicting the situation here, but i'm ...
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| C4 differetiation | 2/21/2006 |
Q: I am having trouble differentiating y=x(a to the power of x) here's what i've done can you show me ...
A: For y = x.a^x lny = lnx + ln(a^x) [logAB = logA + logB] lny = lnx + x(lna) [log(A^n) = ...
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| RE cartesian eqn | 2/20/2006 |
Q: can you help me find the cartesian equation of x=(2-3t)/(1+t) y=(3+2t)/(1+t) in the form y=f(x) ...
A: I knew my solution was longer, but i always have to be elaborate because i'm never sure of the ...
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| cartesian eqn | 2/16/2006 |
Q: can you help me find the cartesian equation of x=(2-3t)/(1+t) y=(3+2t)/(1+t) in the form y=f(x) ...
A: This is a set of parametric equations, expressing x and y in terms of (a parameter)t. For x = ...
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| Mathemtical induction | 2/8/2006 |
Q: Use mathematical induction to prove: 1/3 +1/9 +1/27...+ 1/3^(n)< 1 for n> and =1
A: Sorry for the time it took. The series 1/3 + 1/9 + 1/27 + ..... + 1/(3^n) is a geometric series with ...
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| Inverting Fractions | 2/5/2006 |
Q: I want thank you for the reply. Can the following calculation work? Sarah's age is 6/6 of itself. ...
A: I think you're doing great. All you need add is that in terms of Sarah's age, the sum of the ages ...
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| Alg. 2 | 2/4/2006 |
Q: SQ= square root 1.Identify the first step o solving the equation SQ(6x-4)-SQ(2x+10)=0 2.Simplify ...
A: Maybe its late but it's solution i owe you. SQ= square root 1)The first step of solving the ...
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| Radicals | 1/29/2006 |
Q: I understand that if you are taking the cube root of 3 and multiplying it to the cube root of 9, you ...
A: Sorry for the time it took. Technical problem with the site. These are problems requiring the use of ...
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| combinations/probabilities | 1/26/2006 |
Q: this is a tough one but here goes. 10 books need to be arranged in 4 shelves. any shelf can be empty ...
A: Sorry for the time it took. Technical problem with the site. A good starting note is the fact that ...
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| Inverting Fractions | 1/25/2006 |
Q: Sarah's age is 2/3 of Mary's and 3/4 of Ruth's. The sum of their ages is 46 years. How old is each? ...
A: Sorry for the time it took. Technical problem with the site. The simple idea of inverting comes from ...
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| Probability | 1/23/2006 |
Q: I understand pairwise mutually exlusive events. When I read this problem I first thought the answer ...
A: Sorry for the time it took. Yes, loading means "purposefully altering" the die as you suggested. ...
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| intergration | 1/21/2006 |
Q: s m(D2x/Dt2)dt = s w – k (Dx/Dt)2 dt s= integration sign D= Delta for differentiation Note: All ...
A: Sorry for the time it took. I'm terribly sorry for the delay, there was a mix up and i thought i had ...
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| Determine Hours Traveled | 1/9/2006 |
Q: I want to thank you for your reply. I think that I have a calculation that may work and that does ...
A: I think the answer was just a mere coincidence, it happens. You've actually increased the time by ...
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| Determine Hours Traveled | 1/5/2006 |
Q: Here is myIf it takes 6 hours to complete a trip, how many hours will it take to complete the same ...
A: I'm sure it can. We know that speed(v) = distance(d)/time(t) so, v = d/t Let the speed and time for ...
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| Complex Plane | 12/27/2005 |
Q: I am a little suck by thisDerive the loci (in terms of x and y, the real and imaginary parts ...
A: Sorry for the time taken. This happens to be such a tedious one so you'll have to be patient and ...
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| differentiation | 12/18/2005 |
Q: Given that dy by dx = 3 root x minus x squared and that y = two thirds when x = 1, find the value ...
A: Sorry for the time taken. If dy/dx = 3sqrtx - x^2 Integration of x^n = [x^(n+1)] / n+1 We integrate ...
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| A level Maths | 12/17/2005 |
Q: For 0<è<2ð, how do I go about solving all possible solutions for: tan3è(tan3è + 1) = 2? Thank you ...
A: Sorry for the time taken. For tan3e(tan3e + 1) = 2 let tan3e = x and we have x(x+1) = 2 x^2 + x - 2 ...
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| Word Problem | 12/12/2005 |
Q: A tank can be filled by a hose in 10 hours. The tank can be emptied by a drain pipe in 16 hours. If ...
A: If the hose can fill the tank(volume V) in 10 hrs, the rate of filling is therefore V/10 per hour. ...
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| MAath | 12/12/2005 |
Q: It takes 24 minutes to complete a 5-kilometer race. What is the runner speed in miles per hour?Round ...
A: Distance = 5km Time = 24 mins speed = distance/time so we can simply say speed = (5/24)(km/mins) But ...
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| tangent line | 12/9/2005 |
Q: I hope I'm finding you in the best of health. I'm taking a calculus course and hope you can help me. ...
A: Its been a while. For the line y = -3x/4 + 3 to be a tangent to f(x) = k/x the slope and function ...
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| Solve a simpler problem and look for a pattern | 11/30/2005 |
Q: Find the sum of two hundred even numbers from 0 to 398.
A: This problem appears to be one of finding the sum of an arithmetic series. The sequence is 0, 2, 4, ...
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| Math | 1/14/2005 |
Q: Using 8 numbers,how many combinations of 5 numbers can be generated?
A: Please forgive the delay. I've been on vacation, but didn't notify the allexperts board. The ...
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| Specialist Maths | 1/13/2005 |
Q: For holiday home work my school has set trig functions. I have started to get stuck because the book ...
A: Please forgive the delay. I've been on vacation, but didn't notify the allexperts board. From ...
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| 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: The company make a profit when P > 0 i.e -x^2 + 120x - 2000 > 0 multiplying both sides by -1 and ...
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| Trig limit | 1/8/2005 |
Q: I can't find the Limit lim x->0 (x-tan 2x)/(sin 2x) Help
A: Please forgive the delay. I was on vacation. Inserting x directly results in 0/0 which is ...
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| Water problems. | 1/8/2005 |
Q: Greetings Ahmed. I realise you may be very busy, but please do me a great favour by checking my ...
A: Please forgive the delay. I was on vacation. The answers to a and b are correct. The second answer ...
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| average of continus function. | 1/5/2005 |
Q: sir, how do we find average of continuous functions? first, in fact, what do mean by average of ...
A: Please forgive the delay. I'm on vacation but forgot to notify the allexperts board. The average of ...
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| circles | 12/8/2004 |
Q: A regular hexagon is inscribed in a circle. What is the ratio of the length of a side of the hexagon ...
A: Really sorry for the delay, i am having my exams and doing a project study at the moment. You're ...
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| sine and cosine function | 12/8/2004 |
Q: is there a formula for the sine function and the consine function when dealing with graphing them. ...
A: Really sorry for the delay, i am having my exams and doing a project study. I'm not sure i fully get ...
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| 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: Really sorry for the delay, i am having my exams and doing a project study. Let the lengths of the ...
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| Statistics | 12/7/2004 |
Q: A random sample of 10 parking meters in a beach community showed the following incomes for a day. ...
A: I've been having my exams at school as well as a project study. I've also been a bit ill which is ...
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| Radius of Curvature | 12/7/2004 |
Q: hey, just wondering what the RADIUS OF CURVATURE is? if I have a radius of curvature of 250mm what ...
A: Really sorry for the delay, i am having my exams and doing a project study. At a particular point on ...
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| Integration | 12/5/2004 |
Q: I cannot seem to find the integral of Sin^-1 x by dx when the boundaries are 0 and 1. Also, I could ...
A: Really sorry for the delay, i am having my exams and doing a project study at the moment. To ...
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| parabolas | 12/2/2004 |
Q: find the focus and the directrix. 1) x^2=2y 2) y^2=-4x
A: Really sorry for the delay, i am having my exams and project study. The general equation of a ...
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| differentiation | 11/30/2004 |
Q: what is the chain rule and can you explain how it works
A: The chain rule allows you to use the normal rules of differentiation for even more complex ...
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| Standard Deviation | 11/30/2004 |
Q: I have a set of numbers: 69,70,72,73,75,76,76,77,80,82. I am to find the standard deviation for ...
A: Really sorry for the delay, i am having my exams and project study. To find the standard deviation, ...
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| mechanics | 11/28/2004 |
Q: A mass of 336kg falls a distance of 17.5mm on to the stop at the lower end of a vertical steel ...
A: I've been having my exams at school as well as a project study. I've also been a bit ill which is ...
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| pai | 11/28/2004 |
Q: Can you explain to me how the value pai ( 3.14..) was derived. Who is the first person to find this?
A: Really sorry for the delay, i am having my exams and project study. I'm really not too good with the ...
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| functions | 11/25/2004 |
Q: give the domain, range, and zeroes of the functions. 1) f(x)= absolute val. [x] +3 2) f(t)= sqrt ...
A: Really sorry for the delay, i was having my exams and project study. 1)x and f(x) can take all ...
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| Equations | 11/21/2004 |
Q: Assalumu Alaikum. I am stuck on the following problems, I would be very grateful if you could help ...
A: Wa Alaek Salam, For simplicity, we write the squared of x as x^2. 1)(x+1)^2 = (x + 1)(x + 1)= x^2 + ...
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| Solve For $0.60 | 11/17/2004 |
Q: I want to thank you for the reply. 6 pens/1/2 dozen pens can be simplified to 1 by converting units ...
A: There are actually no rules concerning that. It all comes down to the situation, you have to adjust ...
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| inequalities | 11/16/2004 |
Q: find the set of of values for which a) both 5x + 3 < 3x - 1 and 2x^2 - 6x -8 < 0 for the first part ...
A: a)5x + 3 < 3x - 1 5x - 3x < -1 - 3 2x < -4 x < -4/2 x < -2 b) For 2x^2 - 6x -8 < 0 ( 2x - 8 ) ( x ...
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| Area of a shaded rectangular region inside a semicircle. | 11/15/2004 |
Q: A person in a rowboat 2 miles from the nearest point on a straight shoreline wished to reach a house ...
A: I've been having my exams at school as well as a project study. I've also been a bit ill which is ...
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| applied max and min storybook problems | 11/15/2004 |
Q: Find the maximum volume of a right circular cylinder that can be inscribed in a cone of altitude 12 ...
A: I've been having my exams at school as well as a project study. I've also been a bit ill which is ...
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| applied max and min storybook problems | 11/15/2004 |
Q: A long rectangular sheet of metal 12 in. wide is to be made into a rain gutter by turning up two ...
A: I've been having my exams at school as well as a project study. I've also been a bit ill which is ...
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| Solve For $0.60 | 11/15/2004 |
Q: I thank you for the reply. I am curious to know how 6 pens/1/2 dozen pens equals 1. Can you ...
A: If you were dividing 6 pens by 1/2 dozen pens, then it would be 1 but if you were merely stating ...
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| exponents | 11/11/2004 |
Q: i have trouble dealing with the negatives on the exponents. 1) (3^-2x)^2 * x^-5 2) x^-1(x^-1/3 - ...
A: Sorry about the delay, a technical problem. First let me state that (x^a)^b = x^(ab) (x^a)(x^b) = ...
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| HELP!!! | 11/11/2004 |
Q: Can you please help me with the question below? i reached for the first section of the newspaper ...
A: Sorry about the delay, a technical problem. There are a lot of ways to go about this but i guess its ...
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| Eigenvalues | 11/11/2004 |
Q: Ok, so i got the following Quadratic Equation: m1m2x^2 + m1K2x + m1K3X + m2xK1 + k1k2 + k1k3 + ...
A: Sorry about the delay. Well, you really don't have to use that formula to find the roots to confirm ...
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| Solve For $0.60 | 11/11/2004 |
Q: I want to thank you for the reply. If 3 pens cost $0.30, then 6 pens will cost $0.60. The ...
A: Sorry for the lateness. (6 pens/1/2 dozen pens) is simply 1. So, (6 pens/1/2 dozen pens) X $0.30 = 3 ...
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| Eigenvalues | 11/10/2004 |
Q: I am having trouble understanding how i can show taht the following 2x2 matrix has two distinct ...
A: From where you stopped, all you need do is just make a simple rearrangement. First divide through by ...
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| Calculus 2 | 11/8/2004 |
Q: I need to evaluate the integral of x^2/((1+x^2)^2). I think the answer may have something to do ...
A: The delay, a terrible thing. I'm sorry but it was a technical problem here. For this question, we ...
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| Eigenvalues | 11/8/2004 |
Q: I am having trouble understanding how i can show taht the following 2x2 matrix has two distinct ...
A: The characteristic polynomial would be a quadratic in #(lambda). With the knowledge of the fact that ...
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| Pre Calc. Question :( | 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: 1)1/(cscx)(sec^2x) = [1/(cscx)].[1/(sec^2x)] But 1/(cscx)= sinx and 1/(sec^2x)= cos^2x, therefore ...
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| A lottery,playing a calculated guess rather than just a guess | 11/7/2004 |
Q: Followup To Question -Followup To Question - The U.K.Lottery has 49 numbers we have to choose 6 ...
A: I'm sorry about your computer, hope you've had it sorted out now. About what i wanted to share with ...
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| -------------------------
... | 11/5/2004 |
Q: I need your help. Our Association ByLaws and/or Covenants rules state that we must have the approval ...
A: I don't think that is legal at all. Like you said, every member is entitled to abstain and no one ...
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| Complex Numbers | 11/5/2004 |
Q: Can you show me a way to easily calculate the roots of the equation (Z^6) - 1 = 0
A: z^6 - 1 = 0 z^6 = 1 z = 1^(1/6) which refers to all the sixth roots of 1 Converting 1 to its polar ...
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| equations | 11/4/2004 |
Q: can we call the following equation an exponential equation ?and how can we solve it ? ...
A: Exponential functions are always of the form a^x where 'a' is a constant and is positive. So i don't ...
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| Math | 11/1/2004 |
Q: Magic Video Games, Inc. sells an expensive video computer games package. Because the package is so ...
A: If the management does not want to refund the purchase price on more than 7% of products, the ...
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| Statistics | 10/31/2004 |
Q: In a study of brand recognition, 80.9% of customers recognized the logo for Chevrolet (hypothetical ...
A: mean = np = 11(0.809) = 8.899 standard deviation = sqrt(npq) = ...
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| Statistics | 10/31/2004 |
Q: Maclean's reported that 14% of all books sold are of the romance genre. If a local bookstore sells ...
A: a)mean = np = 316(0.14) = 44.24 standard deviation = sqrt(npq) = ...
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| Statistics | 10/31/2004 |
Q: Women have heights that are normally distributed with a mean of 161.0 cm and a standard deviation of ...
A: mean = 161.0cm standard deviation = 6.2cm the car seat would only fit women taller than 158cm. ...
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| Statistics | 10/31/2004 |
Q: For people who buy ice cream, the all time favorite is still vanilla. About 25% of ice cream sales ...
A: a)mean = np = 175(0.25) = 43.75 standard deviation = sqrt(npq) = ...
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| Statistics | 10/31/2004 |
Q: Privacy is a concern for many users of the Internet. One survey showed that 55% of Internet users ...
A: a)If the probability of success is p, the probability of failure q = 1-p mean = np = 10(0.55) = 5.5 ...
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| Statistics | 10/31/2004 |
Q: Listed below are 20 Nationwide Insurance agents in the St. John's-Mount Pearl area: ...
A: The kind of sampling involved in your questions here are called random sampling. These questions are ...
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| trig equations | 10/30/2004 |
Q: I don't understand what you did here.Please explain.cot # = 2 implies tan # = 1/2 # = arc tan ...
A: The cotangent of any angle is the reciprocal of the tangent of the angle i.e cot # = 1/tan # So if ...
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| heads uP! need help with this question: | 10/30/2004 |
Q: A total of 18 animals are in a field. Some are chickens, some are sheep, and some are cows. The ...
A: Sorry about the delay. I had a problem with my pc. Lets say we have x cows, y sheep and z chickens. ...
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| pre-cal volume and area word problems | 10/30/2004 |
Q: Please help me with these 5 problems that I am stuck on. You don't need to do all 5, do what you can ...
A: Sorry about the delay. I'll , however, try my best. 1)The volume of the box would be V = xyh = 300 ...
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| trig equations | 10/29/2004 |
Q: Can you please explain what is wrong with my way of doing the following problem:If theta is an angle ...
A: I can see one mistake. cot = cos/sin but sin = sqrt(1 - cos^2) and not 1 - cos like you wrote. Try ...
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| numerical differentiation | 10/28/2004 |
Q: using forward and central differences to estimate the first derivative of f(x) at x=1. start with ...
A: I really think you would do well by reading up the topic of numerical differentiation on a good text ...
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| Hyp | 10/26/2004 |
Q: f(x)= tan hx Rf=? Df=? g(x)= cot hx Rg=? Dg=? tnx
A: I'm assuming you are referring to hyperbolic tangents and cotangents i.e tanh x and coth x. tanh x = ...
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| what is an angles and name... | 10/26/2004 |
Q: what is an angles and name them how many angles we have ?
A: I'm terribly sorry for the delay. An angle can be described as the rotation required to superimpose ...
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| Calc I | 10/23/2004 |
Q: Just having a little trouble with these Using the Sqeeze Law of Limits find the limits Lim x->0 x^2 ...
A: 1)The value of siny always lies between 0 and 1 i.e 0 <= sin 10x <= 1 which implies 0 <= sin^2 10x ...
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| Statistic math : sampling distribution | 10/23/2004 |
Q: This topic is about sampling distribution. The question is as follow: A study shoes that 46 percent ...
A: There were a lot of mistakes in your calculations(it doesn't matter if you still got the answer ...
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| Statistics | 10/22/2004 |
Q: " A student that just graduated from high school has a 61% chance of being accepted to university A, ...
A: If the probability of an event occuring is p, the probability of the event not occuring is 1-p. lets ...
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| trig | 10/22/2004 |
Q: The perimeter of regular pentagon ABCDE, shown in the accompanying diagram, is 100 inches. a. find ...
A: Imagine the pentagon to be inscribed in a circle of radius r. If the perimeter of the pentagon is ...
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| mod math | 10/22/2004 |
Q: January 1, 2000 was a Saturday, and 2000 was a leap year. What day of the week will January 1, 2050 ...
A: A leap year occurs once in every 4 years. From January 1, 2000 to December 31, 2003 we have a ...
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| complex number | 10/22/2004 |
Q: (z-1) power 5=(z+1)power 5 Z=?
A: (z-1)^5 = (z+1)^5 Expanding both sides gives z^5 - 5z^4 + 10z^3 - 10z^2 + 5z - 1 = z^5 + 5z^4 + ...
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| algebraic expression | 10/21/2004 |
Q: and I hope you're feeling better now. Onewhat does that mean by "the units digit"? Can you ...
A: I feel better now, thank you. 'the units digit' simply refers to the last number to the right of a ...
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| calc | 10/20/2004 |
Q: Is this correct lim x-->0 3sin(3x)/2 3sin(0)/2, or 0/2, or 0. and f(x)=4/(x+8 squared) What is ...
A: As for the first question, you're correct. For f(x) = 4/(x+8)^2 = 4(x+8)^-2 The slope at any point ...
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| derivatives of trig functions | 10/20/2004 |
Q: This is the problem: xcosy=y. I am suppose to find d^2y/dx^2 of xcosy=y. I was able to find dy/dx of ...
A: I'm going to start from the beginning. All we do is find the derivative of every expression with ...
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| triangles | 10/20/2004 |
Q: Ok i have a triangle that is a length of 27 a hight of 10 and a half and a hypotinuse of 29. The ...
A: The angle corresponding to a length would be the one facing it(i.e the angle which the line is in no ...
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| A group can charter a particular aircraft... | 10/19/2004 |
Q: Would you please take me through the steps to solve the following question? I thank you very much. ...
A: Well, what the information is telling us is that it doesn't matter what the number of people in a ...
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| radians | 10/19/2004 |
Q: how many radians equal 360 degrees? I know that the answer is expressed in termsd of pi but I can't ...
A: Sorry for any delay. Let me give you a way of always remembering this. 360 degrees which corresponds ...
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| algebraic expression | 10/18/2004 |
Q: I'd appreciate if you could show me the operation to solve the following question. "For a given ...
A: I'm sorry for the delay, i was a bit ill. If the first and second digits are x and y respectively, ...
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| trig | 10/16/2004 |
Q: PointA(1/2,sqrt(3)/2) is on the unit circle whose center is the origin. If theta is an angle in ...
A: Due to the fact that i'm unable to provide you with any kind of sketch, i think it'll be good if you ...
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| trig | 10/16/2004 |
Q: The expression sinA(cscA-sinA)is equivalent to cos^2A.I can't get that. please help.I'm having a ...
A: I'm sorry for the delay. I was a bit ill. cscA is the short form for cosecA which equals 1/sinA. ...
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| trig | 10/16/2004 |
Q: The multiplicative inverse of (sin90)^2 + (cos90)^2 equals 1. My question is why is that so?I hope ...
A: It doesn't matter what the value of the angle is, (cos#)^2 + (sin#)^2 = 1 this is a trigonometric ...
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| piecewise functions | 10/15/2004 |
Q: i have two questions evaluate the folliwing for the piecewise function: let f(x)=2x+1, if x<0 ; =x, ...
A: I'm sorry about the delay. I'm afraid i don't get your first question, what does it ask? For the ...
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| Fractions | 10/14/2004 |
Q: How do you subtract whole numbers and fractions example 7 - 8 15/7
A: I don't quite get your figures. But i'll still explain how to perform operations on whole numbers ...
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| GEOMETRY | 10/14/2004 |
Q: ABCD is a square. If the coordinates of three of its vertices are A (-1,2a), B(a,2a), C(a,0),find ...
A: Well, (a,0) and (a,2a)lie on the same vertical line while (-1,2a) and (a,2a) lie on the same ...
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| 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: We are interested in finding the gradient of this line which is y2 - y1/x2 - x1 = 10 - 7/8 - 4 ...
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| Triangle | 10/13/2004 |
Q: a 90' triangle is supposed as ABC triangle, A^=90' a=line infront of A^ angle, b=line infront of B^ ...
A: Even for a = 2bc, the situation is still ambiguous because a,b,c,B,C could take values from an ...
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| advanced math project | 10/11/2004 |
Q: Advanced Math Project #1 Jethro and the Home Video Jethro was driving his pickup truck down a ...
A: Sorry about the delay. I'll only help with the obvious maths involved. According to the officer, the ...
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| applications of matrices | 10/10/2004 |
Q: I have to select topic & give short presenttion in the class on the applications of a mathematical ...
A: I'm sorry about the delay. We had a technical problem around here. I'm also sorry that i really ...
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| vectors | 10/9/2004 |
Q: it is given that r and s are two vectors and |r|=5units. find the value of |r+s | when s is ...
A: I'm sorry about the delay. We had a technical problem around here. I'm happy to let you now that ...
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| quadratic functions and models | 10/8/2004 |
Q: in a certain electric circuit, the available power P (in watts), depends on the current, I (in ...
A: I'm really sorry about the delay. We had a technical problem around here. Using the method of least ...
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| Triangle | 10/8/2004 |
Q: a 90' triangle is supposed as ABC triangle, A^=90' a=line infront of A^ angle, b=line infront of B^ ...
A: I'm sorry about the delay. We had a technical problem around here. I'm afraid your question is a bit ...
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| Binomial theorem | 10/6/2004 |
Q: Find the value of r if the coefficients of the rth term from the begining and the rth term from the ...
A: For the expansion of (3x+15)^15, the coefficients of the rth term from the beginning and end are ...
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| Pre-Calculus | 10/5/2004 |
Q: Find the standard form equation of the conic. An ellipse with minor axis along the x axis, one ...
A: Sorry about the delay. The standard form of the equation of an ellipse is written x^2/a^2 + y^2 /b^2 ...
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| simplifying square root | 10/5/2004 |
Q: I have a very basic question about simplifying square roots. I can not remember how to remove the ...
A: Basically, you just have to start by trying to identify the perfect squares you recognise as ...
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| quadratic modeling | 10/4/2004 |
Q: A certain quadratic function has the form f(x)+ ax^2 + bx + c, where a, b, and c not equal to ...
A: f(x)= ax^2 + bx + c f(-2)= a(-2)^2 + b(-2) + c = 4a - 2b + c = -18 f(0)= a(0)^2 + b(0) + c = c = -8 ...
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| applying quadratic functions | 10/4/2004 |
Q: Stacy has 30 yards of fencing that she wishes to use to enclose a rectangular garden. If all of the ...
A: Alright then, we'll start from where you're stuck. Generally, for a quadratic equation of the form ...
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| compact sets | 9/30/2004 |
Q: Must not a compact set be infinite? Answer - Hi jsquarek, A set S of real numbers is compact if and ...
A: I'm sorry that i'm just attending to you. Like i said before, i'm not able to really rigorously give ...
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| motion problem | 9/29/2004 |
Q: Would you mind checking if my approach to solve the following distance is correct? I'd also ...
A: 'A' is greater but you made some mistakes. Your approach is, however, good enough. Now, to point out ...
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| equations | 9/29/2004 |
Q: Solve for x: x^5.2=112 Can you please explain to me all the different ways to do this? That would be ...
A: Glad to hear you did well in your test. x^5.2 = 112 We have to use logarithms, we'll use 10 as our ...
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| Which is greater? | 9/28/2004 |
Q: This is a question from the GRE.0 < X < 1 Colum A X + X three-squared + X five-squared + X ...
A: I'm afraid column A is the greater. You would have been right if X were not between 0 and 1. Look at ...
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| general math question | 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: Glide ratio is an aviation term that refers to the distance an aircraft will move forward for any ...
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| 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: I'm terribly sorry about the delay. I had a technical problem with the site. If AX = B multiplying ...
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| Derivation | 9/23/2004 |
Q: In general, I know what a derivation is, but I don't know how it is calculated. I know some ...
A: All derivatives are found using the methods entailing the first principles. This method is the basis ...
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| A lottery,playing a calculated guess rather than just a guess | 9/21/2004 |
Q: Followup To Question - The U.K.Lottery has 49 numbers we have to choose 6 to win the big prize ...
A: Been long. I have to confess that i completely forgot about making any progress as regards your ...
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| math/science | 9/19/2004 |
Q: How can you figure out what is good precision and accuracy? I asked my teacher and he explained to ...
A: Like i mentioned before, accuracy is measured in terms of absolute error and that is where ...
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| 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: When a polynomial f(x) is divided by (x-a), the remainder is always f(a). 1)So when f(x)= ...
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| Coordinate geometry question | 9/16/2004 |
Q: I am generally ignorant when it comes to coordinate geometry, so I'll apologize in advance if my ...
A: I know this is terribly late. I had a technical problem with the site. Please forgive me. Well, to ...
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| math | 9/15/2004 |
Q: 4(-2)Sqyuared +8(-2)+3(-2)+6=
A: 4(-2)^2 = 4(-2)(-2) = 4(4) = 16 8(-2) = -16 3(-2) = -6 Therefore, 4(-2)^2 + 8(-2) + 3(-2) + 6 = 16 + ...
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| math/science | 9/14/2004 |
Q: I'm having trouble understanding the difference between accuracy and precision. So, I'm hoping you ...
A: Precision refers to the degree of agreement between the replicate measurements or of closeness of ...
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| conversions | 9/12/2004 |
Q: Is there any shortcut to doing a conversion like: 129cm to dm or 12.9g to kg. Using the long way of ...
A: Just as an example, 1kg = 1000g = 10^3 g So, 1g = 10^(-3)kg = 0.001kg To convert g to kg easily, you ...
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| probability | 9/12/2004 |
Q: ------------------------- Dear Mr. Salami, I'm sorry, but I've taken the question as written right ...
A: I'm terribly sorry about the delay, was a technical problem with the site. Anyway, i think what the ...
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| math | 9/11/2004 |
Q: Danika biked to the beach at a speed of 9 mph. She returned by car at 24 mph. The round trip took 1 ...
A: Sorry about the time taken. Let the distance to the beach be x miles, then if the time taken to get ...
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| Limit | 9/10/2004 |
Q: I want to know what limit is and how a limit is calculated. Thank you. and please tell me where you ...
A: Forgive me for the horrible delay. Well, i'm not sure that i can tell you everything about limits in ...
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| A Problem I can not solve | 9/1/2004 |
Q: There is this problem that I have been trying to solve for three days without result. I would really ...
A: I'm terribly sorry about the delay. Anyway, i'm just going to ask you to use some applicable laws of ...
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| algebra | 8/30/2004 |
Q: What fractions are between 1/2 and 1/3
A: There are definitely an infinite amount of fractions between 1/2 and 1/3. As an arbitrary example, ...
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| average problem | 8/27/2004 |
Q: I'm stuck with the following average question. I'd appreciate your help... Regards, CelineThe ...
A: The sum of the P numbers would be PX while that of the N numbers would be NY. Altogether, there are ...
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| if I have a parabolic curve... | 8/16/2004 |
Q: if I have a parabolic curve and I mark a dot or a point at the highest part of the curve where it ...
A: At the highest point, the tangent would just be horizontal. So it's equation is of the form y = k ...
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| Sylabus D | 8/15/2004 |
Q: i am mojtaba. thank you for answering my last question about function. now this is a SylabusD ...
A: Having two angles of a triangle gives you the third one. In this case, it would be 40'. You could go ...
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| Proportions | 8/13/2004 |
Q: If I understand your reply correctly, are the following correct? A proportion having 3 different ...
A: No, they aren't. I gave you the formula 4. nC2 nCr = n!/(n-r)!r! So, nC2 = n!/(n-2)!2! where n! = ...
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| Function | 8/13/2004 |
Q: solve this function: 5f(x)+3f(-x)=x6 note: x6=x^6 eg(2^6=2x2x2x2x2x2) thank you
A: Well, there are quite a number of ways to look at it. But let's try this. Let both sides of the ...
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| Proof of Newton's Gravity | 8/13/2004 |
Q: Q.How did newton prove that the product of the masses of two bodies is directly propotional to the ...
A: Concerning how he proved that that the force is at the centre, thats a bit long and you can find it ...
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| QUADRATIC FORMULA | 8/11/2004 |
Q: How are you doing today? I hope all is well with you. I'm having difficulty with these problems. ...
A: I'm terribly sorry about the delay. For a quadratic equation, ax^2 + bx + c = 0, the roots are ...
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| Hi.
Here's the question.... | 8/11/2004 |
Q: Here's the question. I just do not understand how X can be a reminder when 2x is divided by 4 is 0. ...
A: Sorry about the delay. I can't see the question saying that x is a remainder. It only asks for the ...
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| distance problem | 8/10/2004 |
Q: Will you demonstrate your approach to solve the following question? **How long would a car ...
A: speed = distance/time So in this question, speed = 30miles/hr distance = 44 feet but 1 mile = 5280 ...
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| What is the area under the... | 8/8/2004 |
Q: What is the area under the curve y = x³ from x = 1 to x = 2 ?
A: Like i replied in one of your questions, the area under a curve is the definite integral evaluated ...
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| please help | 8/8/2004 |
Q: What is the area under the curve y = x² + 1 from x = 0 to x = 1 ?
A: The area under a curve is the definite integral evaluated between the interval. So the area in this ...
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| function | 8/8/2004 |
Q: When x = 1 the function y = 5x² - 10x – 3 a) has a maximum b) has a minimum c) is ...
A: Turning points occur when dy/dx = 0 So for the function y = 5x² - 10x – 3 dy/dx = 10x - 10 equating ...
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| Proportions | 8/6/2004 |
Q: If a proportion such as a/b = c/d has eight different proportion calculations, how many different ...
A: If we are talking of combinations, then i think that the first and third options in your example are ...
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| probability questions | 8/6/2004 |
Q: 1. When two fair dice are rolled, what is the probability of getting a 4 on the first dice and a 2 ...
A: Forgive me for the delay. 1)When two fair dice are rolled, the outcome on each die is independent of ...
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| mathematics | 8/6/2004 |
Q: Is there any difference between 1/0 and infinity? why 1/0 is undefine?
A: In mathematics the numbers 0 and infinity are used rather ambiguously. 0 is used to refer to any ...
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| Calc Problem | 8/4/2004 |
Q: Given that: f(x)= (x^3) + (ax^2) +bx has critical points at x=1 and x=3, find a and b and classify ...
A: If f(x)= x^3 + ax^2 + bx = y dy/dx = 3x^2 + 2ax + b At critical points, dy/dx = 0 Therefore, 3x^2 + ...
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| Complicated XY-plane question | 8/3/2004 |
Q: Since my question must be accompanied with the visual XY-plane graph, I'll try to describe it after ...
A: The equation of the circle is x^2 + y^2 = 4 and the equation of the parabola is y = x^2 - 3 ...
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| This should not be hard to you | 8/2/2004 |
Q: <1% That mean less than one percent, correct? I always have a hard time remembering which way is ...
A: Of course it means less than one percent. But just as a quick way of recognising each one, consider ...
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| Dear Ahmed,
I need your help.... | 7/31/2004 |
Q: I need your help. Our Association ByLaws and/or Covenants rules state that we must have the approval ...
A: To pass the measure, more than half of the total members of the association should be in favour. ...
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| standard deviation | 7/30/2004 |
Q: Salami, My question for you is about standard deviation. This is a question from the GRE(Graduate ...
A: Sorry about the delay. I'll take you through the steps of finding the standard deviation of a set of ...
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| function problem | 7/24/2004 |
Q: I understood the problem. However I was struck up with these 2 problems. 1) Find all possible ...
A: Sorry about the delay. 1)Considering the problem, the slopes of the lines joining each of the other ...
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| A lottery,playing a calculated guess rather than just a guess | 7/23/2004 |
Q: The U.K.Lottery has 49 numbers we have to choose 6 to win the big prize which makes odds of ...
A: I'm terribly sorry about the delay. But i'm afraid i don't really get the question. I'm talking ...
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| trig | 7/23/2004 |
Q: If y=sinx and y=arc sinx are graphed on the same axes, which of the following would be a line of ...
A: Sorry about the delay. The graph of y = arc sinx lies between x = -1 and 1 and y = -#/2 ad #/2 . The ...
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| homework help | 7/21/2004 |
Q: I am having trouble with the one's below..... The question was - Solve each of the following ...
A: For -7<(2x-5)/2<1 , we solve separately -7<(2x-5)/2 -14< 2x - 5 -9 < 2x -9/2 < x also (2x-5)/2<1 ...
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| math | 7/20/2004 |
Q: If a diameterCOB extends out to P, and PA is a tangent to the circle, if measure of angleAPC=21, the ...
A: If you draw out the situation, you would find that OAP is 90 because AP is a tangent and O is the ...
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| POLYNOMIALS | 7/19/2004 |
Q: When multiplying two polynomials, what fundamental property do you use repeatedly?
A: I'm not exactly sure what you require. But tell you what,when multiplying two polynomials, keep it ...
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| maths | 7/18/2004 |
Q: byee plzz tell
A: This is not exactly in line with my expertise. But mathematics is all about practice. To make sure ...
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| 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: 3log x = log x^3 1/2 log b = log sqrt(b) Therefore, log 2+3log x-(1/2)log b = log 2 + log (x^3) - ...
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| 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: 3log4 2 = log4 (2^3) = log4 8 1/2 log4 16 = log4 (16^1/2) = log4 4 Therefore simplifying gives log4 ...
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| math | 7/14/2004 |
Q: Depreciation of a car is determined by the formula, V=C(1-r)^t, where v is the value of the car, c ...
A: From the question, we know that V = 6000, C = 24000 Using the formula, 6000 = 24000 (1 - r)^5 ...
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| 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: I guess b should be greater than zero because of the problem that would arise when you try to find ...
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| Finding the nearest fraction | 7/13/2004 |
Q: I need an algorithm which, given a decimal value, will return the nearest fraction (1/9, 1/8, 1/6, ...
A: Every decimal value can be converted to a fraction except it is an irrational number. For instance ...
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| math | 7/11/2004 |
Q: This is preparation for next year when I take the MathB regent.I'm trying to learn the math by ...
A: The solutions can be found by considering the equation, y = 2^x - 2x = 0 But unfortunately, there ...
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| standard deviations | 7/11/2004 |
Q: I'm using excel to try to calculate standard deviations, but unfortunately the excel geeks aren't ...
A: I'm sure you are terribly disappointed. I had a problem with my pc, i'm really sorry. Your question ...
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| Fractional Units | 7/10/2004 |
Q: I want to thank you for your reply. I have a two part follow-up question. 1. From you reply, what ...
A: sorry for the delay. We divide by 2 to have all expressions in just lbs (without any number before ...
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| Fractional Units | 7/8/2004 |
Q: How is the answer determined for the following? Do not change, if possible, 2, 1/2 lbs. to 1 lb. to ...
A: i don't quite get you. I believe i have answered this before. But if it makes you feel any better, ...
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| probability | 7/7/2004 |
Q: Here is the question, Any help would be great 2 of 6 people who apply for a college program are ...
A: This is a binomial probability question. The binomial probability distribution describes experiments ...
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| Armstrong number | 7/5/2004 |
Q: Could u please tell me....what is an Armstrong number... Thank you...
A: Armstrong numbers (also called narcissistic numbers or plus perfect numbers)are well known in ...
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| Alternative Solution | 7/2/2004 |
Q: I want to thank you for your reply. Is the calculation from your answer used to convert or change ...
A: The conversion is used to convert kilometers per hour to meters per minute for 1hr = 60 mins and not ...
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| Root-Finding algorithm | 6/30/2004 |
Q: I have a some functions that I am trying to find their root quickly and efficiently. I can't seem ...
A: I can't really understand your function but i would tell you this. The Bisection method could at ...
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| Proof | 6/24/2004 |
Q: Someone gave me this proof that one is equal to negative one. Can you tell me what's wrong with it? ...
A: I really do understand your concern. This is not the first time i have come across something like ...
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| math | 6/24/2004 |
Q: how do you factor 174 digit number
A: I am not sure i understand your question. If you meant finding the factors of a number with 174 ...
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| How doing you solve and simplify... | 6/23/2004 |
Q: How doing you solve and simplify the following: 2x^2 - 11x + 12 3x^2 - 16x + 16 ...
A: let A = (2x^2 - 11x + 12) / ( 6x^2 + x - 12) = (x - 4)(2x - 3) / (3x - 4)(2x + 3) B = (3x^2 - ...
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| Binomial Theorem | 6/23/2004 |
Q: Expand the following: (2x-1)^5 This is the answer that I got: 2x^5 - 10x^4 + 20x^3 - 20x^2 + ...
A: (a + b)^5 = a^5 + 5a^4b + 10a^3b^2 + 10a^2b^3 + 5ab^4 + b^5 In this situation, a = 2x and b = -1 ...
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| Algebra | 6/20/2004 |
Q: Your question was How do you put each of these in a linear form, please? 1) y = ax + bx 2) m-b = ...
A: Sorry about the delay. y = ax + bx = (a+b)x y against x is therefore linear m - b = a/n You could ...
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| 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: Sorry about the delay. There is always a trigonometric way out of problems like this one. since one ...
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| Point in a triangle | 6/18/2004 |
Q: I'm trying to figure out a point's coordinates given that I know a number of values. I am assuming ...
A: I'm really sorry about the delay. your question is a little bit involved but i would say i can't see ...
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| Line integrals | 6/16/2004 |
Q: I have a problem with understanding "main" difference between line integrals. I know different way ...
A: Did you mean the difference between line integrals concerning vector and scalar functions? Anyway, ...
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| 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)Yes, there is Stirling's formula which allows us to do that. It states, for large n n! ~ ...
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| word problem | 6/15/2004 |
Q: please I need you help to solve this problem thank you so much A coffee manufacturer wants to ...
A: If tha amount of the $2.75 coffee is x pounds, the amount of the $5 coffee should be (100 - x)pounds ...
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| alegbra | 6/14/2004 |
Q: 1) when administering a standard intelliegence test, we expect about 1/3 of the scores to be more ...
A: Sorry about the delay. I am answering your question in the order i feel appropriate. (2)Before i ...
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| Triangle Problem | 6/14/2004 |
Q: describe a triangle with an angle that has a degree of 190 or more
A: Sorry about the delay. Maybe i didn't get you but i believe every triangle has the sum of its ...
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| flow rates of compressed air | 6/13/2004 |
Q: i have a small compressor that delivers 30 psi through 1/4 inch outside diameter hose. it connects ...
A: Sorry about the delay. First you need the conversions, 1 psi (lb/in2) = 6,894.8 Pa (N/m2) 1 in2 = ...
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| square root | 6/13/2004 |
Q: Find two numbers such that the sum of their squares is 47 and the difference of their squares is 7.
A: How about going through it like this. Let the numbers be x and y, as usual, x^2 + y^2 = 47 x^2 - y^2 ...
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| irrational numbers | 6/13/2004 |
Q: Determine whether the following statement is true or false. The sum of any two irrational numbers ...
A: Sorry for the delay. Let me start by saying a few things. (1)x and -x are either both rational or ...
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| college algebra | 6/11/2004 |
Q: please can you help me with equations, thank you so much #1 standard form a+bi 2+3i/1-i #2 ...
A: Sorry for the delay. Lets go through it as easy as possible. (1) The first thing you do here is ...
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| Functions | 6/10/2004 |
Q: Find the domain of the function. f (x) = 5x / (x2 - 9)
A: To find the domain of any function you look for points where the function is undefined. This ...
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| scaling factor | 6/8/2004 |
Q: If I have a circle with a radius of one inch. To draw a circle with an area four times as large. ...
A: Sorry its a bit late. We know that the area of a circle of radius r is #r^2. If we decide to work ...
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| Divisors | 6/5/2004 |
Q: "find all possible common divisors of 2n+1 and 3n+9"?
A: I am really sorry for the delay. your question got mixed up wit the answered ones. Maybe i don't get ...
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| 5% X $___ + 2% X $___ = $1,200 | 6/4/2004 |
Q: The following should help: A man invested $30,000 for one year at simple interest; one portion was ...
A: Alright i think i get you now. Let x and y be the two amounts that make up the total value. Using ...
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| 5% X $___ + 2% X $___ = $1,200 | 6/3/2004 |
Q: If you believe that ratios, percentages, proportions are all algebraic too. Then solve it with one ...
A: Alright, lets get this over with once and for all. I would like you explain well what the question ...
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| integers | 6/1/2004 |
Q: you know how you said for cute integers to go 4*4*4*4? well wouldnt it be 4*5*5*5. because "zero" ...
A: Well, i didn't consider 0 as an even number. If you consider it as an even number then the amount ...
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| physics | 6/1/2004 |
Q: i m preparing for written test of M.S i want to ask u some formualas or related topics i hope ...
A: I am assuming you mean that the mass per unit area is 3r. The area of a circular plate of radius r ...
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| Geometry: Properties of Chords | 5/31/2004 |
Q: The point P is any point placed inside a circle. Is it always possible to draw a line through P ...
A: Well, you didn't exactly mention any restrictions to how this line is drawn especially with regards ...
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| Geometry: Properties of Chords | 5/31/2004 |
Q: Prove that a straight line drawn from the centre of a circle perpendicular to a chord will, if ...
A: A straight line drawn from the centre of a circle would only be perpendicular to a chord if it ...
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| 5% X $___ + 2% X $___ = $1,200 | 5/30/2004 |
Q: Is there a non-algrebra solution for determining the answers for the following calculation, perhaps ...
A: I am not sure i quite qet the question. But if the question is asking for the solution of an ...
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| monte carlo methods | 5/30/2004 |
Q: Please help me to use monte corlo methods to evaluate the value of 'e'(ie exponent) Thank you.
A: First of all i would like you to forgive this very late reply. I had a few problems with my ...
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| integers | 5/29/2004 |
Q: call an integer "wild" if no two of its digits are equal and no digit is 0. Call an integer “cute” ...
A: I am really sorry for the delay. Alright then, Let n(W)= The amount of wild integers n(W)= 9P4 (read ...
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| physics | 5/29/2004 |
Q: i m preparing for written test of M.S i want to ask u some formualas or related topics i hope ...
A: I am really sorry for the delay. (1)If you mean the square root of -1, it is written just as i and ...
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| Sum of roots at great power | 5/27/2004 |
Q: Can you help me with this problem: If x1 and x2 are the solutions to this equation:x^2-x+1=0, then ...
A: Sorry for the delay. I hope you are familiar with complex numbers and their polar and exponential ...
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| Differential equations with Laplace transforms | 5/26/2004 |
Q: What is the Laplace transform of the natural log function. I missed class, and can't seem to find ...
A: Sorry for the delay. Why don't you try integrating it by parts? I am sure it wouldn't work but its ...
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| geometry | 5/24/2004 |
Q: 1. find the slope and y-intercept of the graph of each equation x + y = 8 2x - y =4 2. Determine ...
A: Simply put, the graph of a linear expression is always of the form; y = mx + c where m represents ...
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| 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: When 3 six-sided dice are thrown once each of the die can give six different outcomes and we ...
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| um... HELP! | 5/21/2004 |
Q: When the snow stopped falling, Kelly, Miguel and Niha rushed outside to build a snow statue. Kelly ...
A: I am sorry for the delay. Alright, let the snowball sizes have circumferences x,y,z in ascending ...
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| Mechanics: Vertical Motion | 5/21/2004 |
Q: Heres a question i couldnt quite figure out no matter what i did... got my paper in a week, so would ...
A: Sorry for the delay. I'll try to go through this as easy as possible. Consider the forces acting on ...
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| math | 5/19/2004 |
Q: how many nine digit binary numbers do not have any consecutive zeros?
A: Sorry for the delay. I'll try to go through this pretty easily. The first digit of the nine digit ...
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| maths | 5/18/2004 |
Q: what is the product of the following series? (X-A)x(X-B)x(X-C)x(X-D)...(X-Z)
A: Assuming 26 factors and letting f(x)= (x-a)(x-b)(x-c).........(x-z) this is an expression whose ...
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