Mathematics - 31 August 2006

2006-08-31 10:25:18 · 4 answers · asked by Anonymous

Given that there are 6.5 x 10 to the power 9 people alive to day.
How many people have ever been born ?

2006-08-31 09:37:49 · 19 answers · asked by Anonymous

Evaluate (a-b)^2 +bc when a=-2, b+3,and c+4
best answer 32 or 37 or 13 or -13

Simplify (-3/5) (-10X)
best answer -6X or 9X

Write 4/9 as a decimal Place a bar over the repeating digits of the decimal best answer 0.04 or 4.4

2006-08-31 09:26:36 · 4 answers · asked by bsmooth 1

To the ones with the answers to the homework questions do you feel a bit of guilt after reading the above. You can only answer because you LEARNED how to work the problem.

2006-08-31 09:25:23 · 7 answers · asked by Anonymous

the answer is NOT 5/9....its 5....but i forgot how i got the answer....

x-4 / 9 = -1

2006-08-31 09:23:34 · 10 answers · asked by Anonymous

If there are, can you please explain ?

2006-08-31 09:21:04 · 20 answers · asked by Anonymous

15 divided by 3 x 5 - 4 squared

2006-08-31 09:16:54 · 19 answers · asked by Anonymous

i hve no clue what this is i think its mathmatics

2006-08-31 09:11:46 · 10 answers · asked by ally 1

2006-08-31 09:10:53 · 10 answers · asked by iluvhipos 3

the answer is -1 but i don't know how, i asked this question before but i guess i didn't explain it right...you can't find this answer with a calculator, u can only find it algebraically, so to do that, u will have to simplify (sin2x)/x ...so this is where im stuck, i can't simplify it =[

thnx for ur help =]

2006-08-31 09:04:00 · 10 answers · asked by Anonymous

Find all values of x such that cos^2x - cosx = sin^2x, where 0 less than equal to x less than equal to 2-pi. (0 > x > 2pi)

Can someone refresh me how to attempt these kinds of geometry questions? It's part of my readiness test for university math.

2006-08-31 08:55:46 · 12 answers · asked by cheeseballer 3

2006-08-31 08:51:48 · 19 answers · asked by motherof2 1

2006-08-31 08:51:34 · 8 answers · asked by Anonymous

2006-08-31 08:50:10 · 3 answers · asked by iluvhipos 3

there is a way to simplify it, but i keep coming to a dead end.

i haven't had this type of question in a while, so im pretty rusty, thnx for helping me!

2006-08-31 08:48:47 · 6 answers · asked by Anonymous

1.-Lines are composed by points and only by points.
2.-The lenght of a point equals zero.
3.-The lenght of a line equals the sum of the lenghts of the points it contains.
4.-Therefore the lenght of a given line always equals zero.

2006-08-31 08:34:56 · 28 answers · asked by FauxPas 2

2006-08-31 08:29:20 · 11 answers · asked by iluvhipos 3

1) -5/7 x=25 best answer -12, -35

2) x-1/5 =3/5 best answer -3 or 4/5

Not sure any help is appreciated

2006-08-31 08:25:57 · 11 answers · asked by bsmooth 1

2006-08-31 07:35:24 · 23 answers · asked by david12strings 1

Bravo GP! You are the true beckon of decency in an otherwise commercially prostituted and politically dominated scientific community.

http://www.nytimes.com/2006/08/22/science/22cnd-math.html?ex=1157169600&en=0199970a574eba54&ei=5070

2006-08-31 07:15:38 · 7 answers · asked by Anonymous

My husband and I were discussing mathematics the other day (it was a long drive home ^_^), and we came across some interesting things that I hadn't thought of before. And I think most people probably haven't, either. We just accept it.
It turns out that math really is imperfect. The phrase is "numbers don't lie" but I think they do!!
Here is one problem that we couldn't find an answer to:
*Why is it that* when you divide 3 into 100 you get 33.3 repeating, but when you *multiply* 3 by 33.3 reapeating, you get... 99.9 repeating! It should get you back to 100, but it doesn't. Shouldn't it work both ways?? Like, when you divide 3 into 12 you get 4, and when you multply 3 by 4 you get 12. It works. Numbers should always work, but they often don't! Why!??
^__^ Sorry for the rant, but it's really interesting... when you think about it. :)

2006-08-31 07:13:23 · 10 answers · asked by Japandra 3

2006-08-31 06:58:42 · 6 answers · asked by iluvhipos 3

can any one tell me if the following numbers are natural, whole numbers, integers, rational numbers, irrational numbers, or real numbers...please list all that apply. (7.45, squareroot of 16, squareroot of 26, 1/10, 2.321...,0, and 8)

2006-08-31 06:48:17 · 4 answers · asked by bluediamondz03 1

how do you solve 3x^2 - 4x - 5= 0 using the quadratic formula? and leaving irrational roots in simplest form?????

2006-08-31 06:35:02 · 6 answers · asked by latrice7437 2

I am not looking for anyone to answer the problem for me, but can someone show me some steps to find:

The five number summary of the followong set of number

13,7,15,13,13,12,9,11,19,9

2006-08-31 06:34:09 · 2 answers · asked by Anonymous

gracias, realmente necesito este dato...

2006-08-31 06:30:16 · 1 answers · asked by Anonymous

2006-08-31 06:20:37 · 9 answers · asked by wardiebhoy 1

OX = nOQ

If OX = ma + b - ab and OQ = 4a + 2b
(a and b being vectors) clearly show how n = 1/6 and m = 2/3

2006-08-31 06:17:33 · 2 answers · asked by MO 2

2006-08-31 06:04:31 · 2 answers · asked by iluvhipos 3

A 500 litre tank in which chocolate milk is being mixed contains 460 litres of milk and 40 litres of chocolate syrup initially. Syrup is added to the tank at the rate of 2 litres per minute and milk is added at 8 litres per minute. The syrup and milk is kept thoroughly mixed and the mixture is removed from the tank at the rate of 10 litres per minute. The amount of syrup in the tank (in litres) is denoted by S and the time (in minutes) is denoted by t. assuming perfect mixing of the milk and syrup, find an expression S in terms of t.

2006-08-31 05:34:33 · 2 answers · asked by tidus07 2