Mathematics - 26 August 2007

Would you please explain the answer of this problem to me.

(5x/ 3x +1) - (1/9x + 3) = (7/6)

Thanks

2007-08-26 04:22:01 · 14 answers · asked by Gator Girl 5

Solve for y.
3x^2/y=2y+b . Thank you.

2007-08-26 04:21:06 · 4 answers · asked by Anonymous

2007-08-26 04:20:36 · 4 answers · asked by Anonymous

If f(x) = ax^2 + bx + c, where a, b, and c are real numbers, and f(x) > 0 for all x, then does 'a' have to be positive? Who can prove this? I have tried some arguments using concepts from calculus but have not, to my mind, been successful. It's driving me crazy, so I'd love it if one of you can produce a clear, cogent proof that 'a' has to be positive if f is everywhere positive.

2007-08-26 04:10:23 · 6 answers · asked by AxiomOfChoice 2

The square root of a number x is always less than x.

2007-08-26 04:06:31 · 5 answers · asked by Anonymous

I know it's easy, but help me anyway, while your at it figure out this one too.
The difference of two numbers is 6. The second is 9 less than 2 times the first. What are the two numbers?

2007-08-26 04:00:12 · 10 answers · asked by cathy m 2

If I solve for y in the equation 7y+6x = 10, is it that y = 10/7?

If I solve for y in the equation (1/4)y-7x = (15/2), is it that y = 30?

If these are the wrong answers, you any answer kindly show me how to get the right answers?

Thank you.

2007-08-26 03:59:25 · 5 answers · asked by hp 1

2007-08-26 03:42:50 · 2 answers · asked by Rishabh 1

I need help with this homework question
Ive never been good at math and I am absolutley
bazzled at this question I dont' get it at all
can some1 please tell me how I might figure it out
or what the answer is
here is the question exactly as written:

Mrs. Jones had some white paint and some green paint, and a bunch of wooden cubes. Her class decided to paint the cubes by making each face either solid white or green.
Jaun painted his cube with all 6 faces white--Julie painted her cube solid green. Hector painted four faces white and 2 faces green. How many cubes could be painted in the fashion, so that each cube is different from the others? Two cubes are alike if one can be turned so that it exactly matches, color for color on each side, the other cube.

Pleeeeez help i will except all answers just try pleeeez.

2007-08-26 03:36:38 · 5 answers · asked by Pinkadots243 1

Would you please explain the answer of this problem to me.

(2x-1/6) - (x/3) = (x + 4/18)

Thank you very much

2007-08-26 02:55:09 · 5 answers · asked by Gator Girl 5

so we have the circle x²+y²=10, which means its center is at (0,0) and it has a radius of √10. it has two tangents (i think it's two) that pass through the point (5,5). what are the general equations (form ax+bx+c=0) of the two lines?

that's all that's given, it cannot be impossible, and i've seen something like it on Answers. immediate help would be gladly gladly appreciated.

2007-08-26 02:45:48 · 5 answers · asked by crushedblackice 3

Find the present value of 11 payments of 3576 made at the start of each year. Interest is 9% compounded annually.

I got this answer: 24335.39 which is wrong!
The correct one is: 26525.58 <
I have done it this way.. but I got the wrong answer....

3576 * [ (1 - (1.09)^-11 )÷ 0.09 ] = 24335.39

where did I go wrong?

2007-08-26 02:12:04 · 2 answers · asked by Yuuji 1

Solve the system by the method of your choice:
8x+7y=56
y= -8/7x +8
Choose the correct form of the solution below:
no solution
one solution { (a, b) }
infinite solutions { (x, y) | y = ax + b }

If your choice includes a letter a or b, enter the correct numeric value. Otherwise, enter N/A.
a =
b =

2007-08-26 02:09:12 · 6 answers · asked by Anonymous

Given that y=sin^-1 x, find the series expansion of y in ascending powers up to and including the term in x^3.

I have done this part and i got y=x+x^3/6 but you can double check.

Hence, by choosing a suitable value of x, deduce the result of pi to five decimal place.

i sort of used pi/2=y=sin^-1 x
so x=1
then pi= 2 x (1+1/6)
but this answer is like very far from the true value of pi!!

2007-08-26 02:03:31 · 4 answers · asked by Anonymous

Volume: A box 10 inches high has a square base. The box was made 7 inches longer, and 2 inches narrower (or its width was decreased by 2 inches) while the height remained 10 inches. Give the original length of one side of the box if these changes increased the volume of the box by 30.

2007-08-26 01:50:50 · 7 answers · asked by Anonymous

If x and y are the sum of roots of the quadratic 2x^2 + x -15 = 0

Find
x^2y^3+x^3y^2

i have no idea how to do this. . . .
i need as much help as i can get. . .
thanks =]

2007-08-26 01:19:53 · 6 answers · asked by Hmmmmm 3