Mathematics - 4 November 2007

Factor by grouping: 5a^2 -5bc-5ab+5ac

2007-11-04 16:46:12 · 2 answers · asked by austin 1

The Olympic flame at the 1992 Summer Olympics was lit by a flaming arrow. As the arrow moved d feet horizontally from the archer, assume that its height h, in feet, was approximated by the function
h = -0.002d2 + 0.7d + 6.6.
Find the relative maximum of the function.

2007-11-04 16:44:26 · 4 answers · asked by Anonymous

touch the sphere. What arethe dimensions of the cube?

2007-11-04 16:42:04 · 2 answers · asked by glamour girl 1

A rectangular book has several axes of symmetry, consider the two axes that split it in half and are perpendicular to its sides.

Throw it into the air giving it a rotating motion about one of the axes; repeat with the other axis. Do you notice a difference? Can you explain
it?

2007-11-04 16:39:38 · 1 answers · asked by JOE 2

2007-11-04 16:39:20 · 4 answers · asked by davood s 1

2007-11-04 16:36:36 · 13 answers · asked by Anonymous

I know that tan 75= tan (45+30)=tan (A+B)
so, (tan 45+tan 30) / (1-tan 45 tan 30) =
(1+1/radical 3) / (1-1 times 1/radical 3) then from there my math gets all messed up. Can anyone show me the correct way to finish this and end up with the answer: 2+radical 3? Thank you!!!!!!!!!!!!!

2007-11-04 16:32:21 · 4 answers · asked by Chicosgurrl 1

find the tangent to the graph y=2x-5 at the point (4,3) the equation is y=___ x+ ______

2007-11-04 16:00:49 · 2 answers · asked by Anonymous

2007-11-04 15:29:26 · 6 answers · asked by Anonymous

2007-11-04 15:16:52 · 3 answers · asked by Anonymous

Solve the sytem of linear equations?

3x-2y+z=4
x+3y-4z=-3
2x-3y+5z=7


Im not sure how to do this

anyhelp?

2007-11-04 15:15:45 · 4 answers · asked by Smit 1

2007-11-04 15:12:16 · 6 answers · asked by Anonymous

Find area of region enclosed by the curves.
Two curves are x-y^(2/3)=0 and x+y^4=2.

I know that in this case we should set y^(2/3) = 2-y^4. The problem is, how do I solve for y? Two solutions are +1, -1 but how do I continue from here w/o using a calculator.

2007-11-04 15:10:11 · 1 answers · asked by whatsntomake 1

2007-11-04 15:03:28 · 10 answers · asked by Anonymous

x^4+2x^2-2x=

2007-11-04 14:55:00 · 4 answers · asked by o0o 1

2 = sqrt(x^2 + 7) - x

Can someone help me with this? The answer is x = 3/4 but I have no idea how to get that.

Thanks!

2007-11-04 14:54:26 · 2 answers · asked by DoWHATiDO 3

Suppose that a particular strain of staphylococcus produces a certain symptom in 2% of those infected. At a church picnic 200 persons ate contaminated food and were infected with the organism. What is the probability that the following numbers having this symptom?

I think that I am supposed to use the normal distribution.

a) 10 or fewer.
b) None.
c) More than 4.
d) Exactly 4.

2007-11-04 14:47:15 · 2 answers · asked by Anonymous

3x + 12 = 6
subtract 3x to get x by its self
x + 9 = 6
then I subtract 9 from six and get 3 But when I go and check my answer it is wrong can someone tell me what I am doing wrong.

2007-11-04 14:46:01 · 14 answers · asked by m&m 1

and don't say infinity

2007-11-04 14:42:40 · 10 answers · asked by Steve French 3

Find the tangent line to the graph y=20+5x^2-17x at the point (3,14). The equation y=____x+ ____ is the desired tangent line

2007-11-04 14:42:31 · 3 answers · asked by Anonymous

Here's the equation:

sqrt(b^2 - 5b -14) = b + 11


How do I solve this? Thanks for your help!!!

2007-11-04 14:38:29 · 2 answers · asked by DoWHATiDO 3

Simplify. Express your answer in simplified radical form
(2 times the square root of 12) + (4 times the square root of 27)
(2 times 3.464)+(4 times 5.196)
6.928 + 20.784
27.712

2007-11-04 14:33:30 · 4 answers · asked by meme 1

I have two problems and I can't figure them out, I can't figure it out w/ my math book and my teacher is really mean and never answers the questions I ask.

This is the directions: Write each expression as a logarithm of a single quantity.

1.) 1/2Log (a+2) + Log b - 2 Log c

2.) 3 Log (a+1) - 2 Log (b+2) + 7 Log c

2007-11-04 14:32:18 · 2 answers · asked by lol 2

1/3x+y=-1
4x-3y=18

2007-11-04 14:32:10 · 7 answers · asked by Jamie M 1

^ Its solving equations

Thanks & i need the steps to be shown too

2007-11-04 14:27:36 · 5 answers · asked by barbie 1

I think this answer is wrong 13 is not the solution.
Can someone tell me if I am right

2007-11-04 14:26:19 · 47 answers · asked by m&m 1

hey there! :)
i've developed a new tree structure for organizing semantics.
can anyone give me some pointers on how to prove a tree.
is it good to prove it by analyzing the way the tree is being used to solve a particular problem, say text segmentation?
how should I write a paper on it? like, what are the angle i should focus on and etc.

thanx!

2007-11-04 14:26:17 · 1 answers · asked by thinker 1

2007-11-04 14:15:09 · 2 answers · asked by lovelylittlelady 3

Find a positive number such that the sum of the number and its reciprocal is as small as possible.

2007-11-04 14:14:09 · 3 answers · asked by Britt R 1

2007-11-04 14:12:56 · 9 answers · asked by mztana820 1