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Mathematics - 27 September 2007

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3 fractions that equal 1/4?
i need 3 fractions that equal 1/4

example - 1/4= 1/x +1/x + 1/x

2007-09-27 17:03:21 · 7 answers · asked by Anonymous

f(x)=3x

Evaluate the function when x=2, x=0, and x=-2

Please show all steps, and if you can, tell how you got that answer please and thank you.

2007-09-27 16:58:39 · 5 answers · asked by Anonymous

I am investing in stocks and i am trying to make a somewhat orginized paper with many details about the stock. I was wondering what i would have to do to find out how much a stock has grown (percentage wise) over a 52-week period. I will use GOOG as an example, 52 weeks ago it was at 400.25 and now it is at 567.5, how would I find out how much the stock has grown(percentage wise)? ex. it has grown 15% over the past year. that sort of form

2007-09-27 16:42:39 · 1 answers · asked by deb1033 2

4 + [8 /x] + [4 /(x^2 )],
find F'( x ) ____

Then Find f'( 1 ) ___

2007-09-27 16:39:41 · 4 answers · asked by Anonymous

f(x)= -x²+11x-28

I know I'm supposed to solve for

-x²+11x-28=0

But I'm stuck at

-x²+11x=28

What am I supposed to do after that?

2007-09-27 16:38:01 · 8 answers · asked by Anonymous

prove the following identities: (n choose 0) - (n choose 1) + (n choose 2) -(n choose 3) + .......(-1)^n (n choose n) = 0

(n choose 0) + (n choose 2) + (n choose 4) + (n choose 6) +.......(n choose n)= 2^n-1 if n is even.

probability questions: A bridge hand consists of 13 randomly chosen cards from 52. What's the probability that a bridge hand consists of 4 clubs, 4 diamonds, 3 spades, and 2 hearts?

i got (13 choose 4)(13 choose 4)(13 choose 3)(13 choose 2) all divided by (52 choose 4). which i got to equal 1.795%. Not sure if that is right.

If a bridge hand consists of 4 clubs, 4 diamonds, 3 spades, and 2 hearts. Whats the prob. that they happen to fall in this order?

I was thinking (13 C 4) / (52 C 4) times (13 C 4) / (52 C 4) times (13 C 3) / (52 C 4) times (13 C 2) / (52 C 4). I dont think i did this right at all, but i could be wrong.

Thanks a lot for any help or suggestions.

2007-09-27 16:35:55 · 3 answers · asked by manofsteel322 1

. Express sec x - sin x tanx in terms of cos X


i just cant seem to get to cos x and ive tried everything i can think of. any ideas?

2007-09-27 16:33:38 · 5 answers · asked by pinkfloyd6488 2

a) area of the rectangel and indicate if your answer shows increase, decrease or neither in its rate of change.
b) perimeter of the rectangle and indicate if your answer shows increase, decrease or niether in its rate of change.

answer
a) 14 cm^2/sec(increase)
b) 0 cm/sec

please explain how the get the answer

2007-09-27 16:28:12 · 5 answers · asked by fvsdf s 2

The present dimensions of the candy bar are 15 cm in length, 6 cm in width, and 2 cm in thickness. The CEO has asked your consulting firm to come up with the best way to shrink the candy bar. Because millions of dollars are riding on this decision you will need to find all answers in centimeters correct to three decimal places.

6. Consider reducing two (but not three) of the dimensions by the same number of cm. What would the new dimensions be in each case? (There are three possibilities; in each case you want the volume to be 15% less than the original volume. (i.e., you want it to have the volume found of 153.)

7. Consider reducing all three dimensions by the same number of cm. What would the new dimensions be? (Once again, you want the volume to be 153.)

2007-09-27 16:27:55 · 1 answers · asked by steven m 1

whats the area of a circle with a radius of 15??? if no can anwser i need it soon home work do tomarow i can look in da back of the book but i wanted to c if any one knew. i dont like when yunger people know it an i dont lol

2007-09-27 16:09:13 · 4 answers · asked by eddie 1

2007-09-27 16:02:13 · 2 answers · asked by fabulous! 1

2007-09-27 16:01:51 · 2 answers · asked by StLouisCardinals2006Worldseries 1

-4x-2y=-12
4x+8y=-24

2007-09-27 15:54:45 · 10 answers · asked by idalmis m 1

2007-09-27 15:44:38 · 7 answers · asked by Rajchem 2

a^2-b^2 = 33
a^3-b^3= 817

what is a+b equal to

2007-09-27 15:17:35 · 3 answers · asked by jennifer 2

6x^2+5x-1
x+2

six x squared plus five x minus one
over x minus two

I am not getting a remainder

2007-09-27 15:17:06 · 2 answers · asked by Nanna2 1

2007-09-27 15:16:30 · 3 answers · asked by . 1

a few actually

1. sqrt(x) is this just x?
2.(3/sqrt(x)) what is that one? zero??
3. 6sqrt(x) would that be just 6x??

2007-09-27 15:10:59 · 3 answers · asked by m_carl 1

for algebra

2007-09-27 15:08:05 · 3 answers · asked by devaughnfrazier 1

2007-09-27 15:01:37 · 10 answers · asked by Amber C 1

Solve each system of equations using matrices. If the system has no solution, say it is inconsistent.

{ 2x + y - z = 2
{ x + 3y + 2z = 1
{ x + y + z = 2

Can you explain how you solve this so I understand?

The solution of the system in the appendix is x = 2 and y = -1 and z = 1

2007-09-27 14:59:55 · 2 answers · asked by w s 3

Hi! I'm a sophomore in High School and we use the Interactive Math Program textbooks at my school. The book itself isn't bad but the thing is, it focuses 99% of its attention on understanding and not on actual practice (like no praticing 2X+4=10).

I took the PSAT last year and nothing I learned in that book was on the test at all! I'm really worried about my future in taking the ACT and the SAT. Do you guys have any suggestions (links? advice?)

2007-09-27 14:58:55 · 1 answers · asked by Anonymous

Used Integration by parts; u=ln(3x-1), du=3/(3x-1) dx, dv=dx, v=x. I used the formula uv - Integral v du. I got past the long division, but I think you have to do it again? I did, and am stuck simplifying.

2007-09-27 14:57:28 · 5 answers · asked by Vanessa S 1

A car traveling at 7.0m/s accelerates 2.5m/s to reach a speed of 12.0m/s. How long does it take for this acceleration to occur?





my answer was 2.06
I divided the accelerations by the speed but I'm not sure if that was the right equation

2007-09-27 14:56:59 · 2 answers · asked by Anonymous

2007-09-27 14:48:45 · 9 answers · asked by clay c 1

2007-09-27 14:48:30 · 4 answers · asked by diego 1

lim (5x lnx) / (3x)
x->0+

2007-09-27 14:46:03 · 2 answers · asked by lilrock 1

find the integral of (3x^2 -3x+4)/(-x^2 +2x+15)

2007-09-27 14:45:31 · 2 answers · asked by ! 2

f(x)=(x+1)(x-2)(x-3)

I tried using the product rule with (x+1)(x-2) and getting that derivative and using the product rule again with (x-3). But im not getting a right answer.

2007-09-27 14:42:21 · 3 answers · asked by Lil j 1

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