Mathematics - 8 October 2007

4X / [X^2 - 1]^1/2

So that is 4X over square root of (Xsquared) minus 1.

2007-10-08 08:04:44 · 4 answers · asked by Anonymous

How did this happen?
x^3-2x^2-3x
=x(x^2-2x-3)
=(x-3) (x+1) <---

How did it become =(x-3) (x+1)?
Please explain easily, because this equation is very annoying, especially when I dont understand how the answer happened...

2007-10-08 08:04:00 · 5 answers · asked by Anonymous

2x - 3y = 8
3x + 4y = -22

2007-10-08 08:01:36 · 8 answers · asked by v19 2

a lady drove her car 4 1/8, 5 5/12 and 3 2/3 miles what was the total distance she drove her car?

2007-10-08 07:58:45 · 7 answers · asked by girly girl 2

2007-10-08 07:50:04 · 4 answers · asked by Daisy 1

√3x + 2 - 2=0


yeah i am just lost, by the way just making sure you understand what the problem is, it's 3x+ 2 inside the √ and - 2=0 is outside of it

2007-10-08 07:46:15 · 2 answers · asked by Nick 4

One end of a piece of elastic is attached to a point at the top of a door frame and the other end hangs freely. A small ball is attached to the free end of elastic. When the ball is hanging freely it is pulled down a small distance and then released, so that the ball oscillates up and down on the elastic. The depth d centimetres of the ball from the top of the door frame after t seconds is given by:
d = 100 + 10cos500t

Find
a) the greatest and least depths of the ball,

b) the time at which the ball first reaches its highest position,

c) the time taken for a complete oscillation,

d) the proportion of the time during a complete oscillation for which the depth of the ball is less then 99 centimeters.

2007-10-08 07:36:03 · 5 answers · asked by Anonymous

2007-10-08 07:29:59 · 8 answers · asked by Anonymous

The solution should describe how you know you have found all of the solutions.

Help please?

2007-10-08 07:27:53 · 2 answers · asked by eclipsegt_01_03 2

2007-10-08 07:23:39 · 5 answers · asked by komalu 2

2007-10-08 07:18:37 · 9 answers · asked by glamour girl 1

2007-10-08 07:15:42 · 27 answers · asked by Anonymous

2007-10-08 07:02:42 · 2 answers · asked by Anonymous

How many of them will also be odd? Please include workings and explanations. thanks

2007-10-08 06:57:45 · 4 answers · asked by enp. 1

the reciprocal 1/f:[0,1]-->R is bounded.

2007-10-08 06:56:55 · 3 answers · asked by han 1

-1/2sin2xtan2x

2007-10-08 06:56:36 · 3 answers · asked by Anonymous

Please help me figure out this problem...how do I set it up?

2007-10-08 06:50:26 · 5 answers · asked by flatfoot 3

for some reason i have gone brain dead at the moment and forgot completely on how to do this.. im looking at like its easy but... its one of those days

2007-10-08 06:49:19 · 10 answers · asked by Nick 4

My problem is 20(1/2 x 35)

2007-10-08 06:48:26 · 10 answers · asked by modern_elegance 2

what is the range of the function f ( x ) = xsquared + 4 when the domain is (-2, 5, 7 )?? please help me by clearly stating the steps. thanks!!!!!!!!

2007-10-08 06:46:08 · 7 answers · asked by Anonymous

how do I get started and finish the problem correctly?

2007-10-08 06:38:37 · 4 answers · asked by referencearea 2

Let G be a group and H a subgroup of G. Define N(H) = {x is an element of G | xHx^-1 = H}. How can you prove that N(H) is a subgroup of G?

2007-10-08 06:38:06 · 1 answers · asked by Anonymous

The given point (-2,9) lies on the graph that is symmetric about x-axis, y-axis, and origin. State the other points that must also lie on the graph

2007-10-08 06:32:37 · 7 answers · asked by referencearea 2

least positive values of x at which these occur.

a) y = 5-4sin(x+30°)

b) y = 8-3cos²x

c) y = 60 / [(1+sin²)(2x-15°)

AHHHHHHHH
I have a love hate relationship with maths.

2007-10-08 06:27:15 · 1 answers · asked by Anonymous

Steps on solving this?
3x-2y-3x

2007-10-08 06:21:32 · 2 answers · asked by Anonymous

Have no idea how to do this and have a test tomorrow. Any help appreciated. Any website's appreciated :D.

2007-10-08 06:16:51 · 5 answers · asked by JJ 1

Use the new identities to solve:

3 sec^2 x = 5 + tan x in the range -180 <= x <= 180

Cheers peeps =P

2007-10-08 06:08:30 · 2 answers · asked by Sean 3

Consider
0 = c

This means:
- 0 = - c

But
- 0 = 0

Therefore c = - c

Isn't this in opposition with the law of non-contradiction which states that c = c ?

"One cannot say of something that it is and that it is not in the same respect and at the same time." Aristotle.

Should zero actually have a rational existence?

2007-10-08 06:07:03 · 5 answers · asked by Biob 1

what two shapes can be drawn on sphere that cant be drawn on a plane? what two shapes can be drawn on a sphere and a plane? help pleaseeeeee!

2007-10-08 06:00:37 · 2 answers · asked by Anonymous

2007-10-08 05:54:29 · 11 answers · asked by Miriam R 2