Mathematics - 31 July 2007

what is the answer

2007-07-31 13:58:57 · 15 answers · asked by Anonymous

or is it irrational to use rational numbers? i'm confused...

2007-07-31 13:45:58 · 7 answers · asked by ixat02 2

a^2 - 64 = 0

2007-07-31 13:04:56 · 11 answers · asked by Anonymous

So when you want to graph something on this calculator you have to put in the equation, then press graph, but when I press it, it says "ERR: INVALID DIM"

2007-07-31 12:59:35 · 4 answers · asked by Anonymous

how do you change pounds into stone???

2007-07-31 11:48:54 · 5 answers · asked by Anonymous

I used formula a/b - c/d = (a-c)/(b+d):
8/6 - 2/3 = (8-2)/(6+3) = 6/9,
but the book says the answer is 2/3.
What did I do wrong?

2007-07-31 11:30:46 · 11 answers · asked by Alexander 6

2007-07-31 11:26:47 · 7 answers · asked by BenL 2

simplify question 1) -5x^(-1) + 2y^(-1) over 9x^(-2) -7y^(-2) question 2) (1/x+2)+(4/x-3) over (2/x-3)-(7/x+2) solve the equation question3) (4/x+5)-(6/x-5)=(2/x^2-25) question 4) (8/2x^2+8x)=1-(1/x+4)

2007-07-31 10:47:49 · 4 answers · asked by Jim 2

This is a very cool and hard question and in know it.Anyway no cheating.

2007-07-31 10:40:28 · 4 answers · asked by samand 1

Does anybody know a formula to figure out the following: Say I wanted to take a picture of a wall that is 100 feet in width and in length. How many feet away from the wall would the camera have to be to capture he entire wall???

I obviously could measure the distance with a long measuring tape once I found my self in a position where the entire wall was in the picture, but my goal is to find the formula for the problem.


Thank you for your help.

2007-07-31 10:36:15 · 3 answers · asked by Mike B 2

Its an aptitude question. please solve it. its answers is 7 and half hour (it can be wrong, but very less chance). But my answer is 6 and Quarter hour. plz give a solution with all the steps u taken to solve it.

2007-07-31 10:23:27 · 7 answers · asked by Lolla 2

If <1 is supplementary to <2 and <3 ~= <1, prove AD II BC.

this is the picture for the question.
http://aycu14.webshots.com/image/23453/2003993084943664995_rs.jpg

2007-07-31 10:09:15 · 2 answers · asked by Anonymous

A rocket accelerates by burning its onboard fuel, so its mass decreases with time. Suppose the initial mass of the rocket at liftoff (including its fuel) is m, the fuel is consumed at rate r, and the exhaust gases are ejected with constant velocity ve [v followed by little e] (relative to the rocket). A model for the velocity of the rocket at time t is given by the equation below where g is the acceleration due to gravity and t is not too large.

v(t) = -gt - ve ln((m-rt)/m) [that's v then little e]

If g = 9.8 m/s2, m = 30000 kg, r = 160 kg/s, and ve = 3000 m/s, find the height of the rocket one minute after liftoff.

Ok, any ideas on where to start...? Dont you just plug in?

2007-07-31 09:56:50 · 4 answers · asked by Anonymous

2007-07-31 09:47:23 · 12 answers · asked by Delilah 2

Let X and Y be metric spaces and let A be a subset of X. Suppose f:A-->Y is continuous on A and has a limit at every limit point of A. Show that f has a unique continuous extension to the closure of A.

Thank you

2007-07-31 09:43:32 · 3 answers · asked by Sonia 1

i just need to know how to work it and solve it. plx help ^^

2007-07-31 09:29:28 · 5 answers · asked by Anonymous

I am good at doing indirect proofs,with geometric figures,but this kind of problems always confuse me. So plzz help me out.


Use an indirect proof to show that John exceeded the 55 mph speed limit if he left his house at 8:15 a.m. and arrived at his office 60 miles away at 9:00 a.m. Write the proof using paragraph method.

2007-07-31 09:25:11 · 4 answers · asked by |||(-_-)||| 2

(1/3 x^2 * 9 -99/x)

Can some1 plzz explain this in easy steps? i cant solve this qwestion. thanx!!

2007-07-31 09:24:12 · 8 answers · asked by playerr 3

Finding the roots of a quadratic equation with leading coefficient greater than 1:

4y^2=2y+6

(If there is more than one solution, separate them with commas.)

2007-07-31 09:22:13 · 6 answers · asked by Anonymous

2007-07-31 09:06:13 · 7 answers · asked by willie joe m 1

q(x)= ln(x+3) - ln(x-5)

2007-07-31 09:02:15 · 2 answers · asked by c 1

10x-4y=24

How do I solve this!?

2007-07-31 09:01:58 · 6 answers · asked by Anonymous

Perform the indicated operation. Simplify if possible.

(3) / (x) - 8 ) + ( 22 ) / ( 8 - x )

2007-07-31 09:01:15 · 2 answers · asked by Anonymous

2007-07-31 08:59:34 · 4 answers · asked by Amber 1

1.) cos^-1(sqrt(3)/2)
2.) tan(210°)
3.) cos(0)
4.) cos(45°)
5.) csc(-5pi/6)
6.) sec(-180°)
7.) cot(-pi/2)
8.) sin^-1(1/2)
9.) tan(pi/2)

2007-07-31 08:59:15 · 2 answers · asked by b country90 1

In the state of CT, there exists Powerball for which six numbers must be chosen out of a pool of 75 numbers. No two numbers can be chosen twice. Is it possible to play every numerical combination to gurantee a wim of more than 11 million dollars.

2007-07-31 08:50:53 · 5 answers · asked by Anonymous

Write the equation of a circle with endpoints of the diameter at (2, -5) and (-4, 3).
Show your work for credit.

Thanks, I looked into the lesson, and i cant figure this out, every time i follow the formula, I seem to get it wrong, Please help with this one. I would really appreciate it!

Thanks To All!

2007-07-31 08:44:07 · 4 answers · asked by Triock91 1

2 - (9u+4z / 3u) + (u+6z / 8u)

Express as a single fraction in lowest terms

2007-07-31 08:36:53 · 6 answers · asked by Amy 1

2007-07-31 08:36:42 · 11 answers · asked by Anonymous

ok so does anyone know how to prove that the diagonals of a kite are perpendicular?

2007-07-31 08:25:43 · 5 answers · asked by balla24 1