Science & Mathematics - 7 December 2006

I need to define the variable, write an equation, and solve for the following problem. I can determine the answer, but I don't know how to write out the problem:

Cassie is 9 years older than her brother. Three years ago, Cassie was 4 times as old as her brother. How old is each person now?

The answer is Cassie is 15 and the brother is 6. But how do I define the variable and write out the equation?

Let b = brothers age now
B + 9 = Cassie’s age now

That is about as far as I can get with this problem.

2006-12-07 04:33:00 · 5 answers · asked by Kathy K 1 in Mathematics

Snow in Jamaica?

2006-12-07 04:32:45 · 15 answers · asked by kate moss - the chameleon 1 in Weather

Ok, this is really urgent and I must get this. Can someone anyone please tell me what the following are broken into:
Co Cl2 -->

H20 -->

Ag NO3 -->

If I'm not clear tell me and I'll correct it right away... For example
KNO3 --> K^(+1) + NO3^(-1)

Please help as much as you can.

2006-12-07 04:32:25 · 4 answers · asked by A 2 in Chemistry

2006-12-07 04:29:18 · 5 answers · asked by pamela j 1 in Mathematics

a) 8 b) 32 c) 24 d) 33 e) 18

2006-12-07 04:29:05 · 1 answers · asked by bedkkd 1 in Chemistry

In contrast to the Earth.

2006-12-07 04:27:41 · 8 answers · asked by Wisdom 4 in Astronomy & Space

(cont-) compund weighs 5.80g. what is the molecular formula of maleic acid? ANSWERS a)CHO b) C6H6)6 c)C2H202 d) C4H4O4 e)C3H3O

2006-12-07 04:26:31 · 2 answers · asked by bedkkd 1 in Chemistry

I know it seems like a silly question but I've been searching for ages and just come up with rubbish! I have to do a poster for college with a detailed diagram of the river sort of cross section and that.

2006-12-07 04:26:28 · 2 answers · asked by floppity 7 in Earth Sciences & Geology

2006-12-07 04:25:37 · 10 answers · asked by Ferrrell S 1 in Mathematics

2006-12-07 04:22:31 · 5 answers · asked by scoobydoocsi 1 in Engineering

a) 2.41x 10^23 b) 2.41 x10^22 c) 3.01x 10^23 d) 1.81 x 10^22 e) 3.01x 10^22

2006-12-07 04:21:41 · 5 answers · asked by bedkkd 1 in Chemistry

I have tried to understand the string theory for a while, but every website I go to, it is too complex for me. The only thing I think I understand about it, is that everything effects everything else in the universe. Can someone explain the string theory in Lamens terms? OR atleast give me a website that would explain it so an idiot like me can understand it.

2006-12-07 04:21:34 · 6 answers · asked by mikzilla0 2 in Physics

Is it in the same direction as the gravitational attraction, away from the center of gravity of an object, or opposite to the direction of gravitational attraction?

2006-12-07 04:21:31 · 3 answers · asked by bramos100702 1 in Geography

You wish to neutralize a solution of pH = 6.6 by adding an equal volume of a neutralizing solution. What sould the pH of your neutralizing solution be?

2006-12-07 04:21:22 · 4 answers · asked by Valray C 1 in Chemistry

Yes or No and Why you think

2006-12-07 04:18:10 · 5 answers · asked by Anonymous in Physics

assume concrete weighs 150 pounds per cubic foot.

2006-12-07 04:16:46 · 14 answers · asked by scoobydoocsi 1 in Engineering

They say this is normality. Can u teach me? Calculate the number of milliliters of solution required to provide 12.5 g of calcium hydroxide, Ca(OH)2, from 1.10-N calcium hydroxide solution in reactions that replace both hydroxide ions.

2006-12-07 04:16:24 · 6 answers · asked by Kia 1 in Chemistry

i need a sketch of all the bonds in its structure

2006-12-07 04:15:48 · 1 answers · asked by chemistrycarolyn 1 in Chemistry

2006-12-07 04:15:07 · 8 answers · asked by kid mac 1 in Mathematics

i need a sketch of the molecular structure showing all the bonds

2006-12-07 04:13:48 · 1 answers · asked by chemistrycarolyn 1 in Chemistry

how cold is it in Waco

2006-12-07 04:13:24 · 7 answers · asked by Gene B 1 in Weather

We all know that water becomes deadly when exposed to an electrical current, but why is this? What does electricity do to the water??

2006-12-07 04:10:41 · 9 answers · asked by Anonymous in Physics

gof = fog

2006-12-07 04:10:28 · 3 answers · asked by gaurav dixit 1 in Mathematics

2006-12-07 04:08:04 · 12 answers · asked by Anonymous in Mathematics

I'm not sure if its to a region above the earth's atmosphere, to a region beyond the moon, to a region beyond the solar system, or forget it, you can't travel enough since it extends to infinity?

2006-12-07 04:06:51 · 7 answers · asked by bramos100702 1 in Astronomy & Space

2006-12-07 04:06:27 · 4 answers · asked by hillbilly rockstar 1 in Biology

2006-12-07 04:02:38 · 3 answers · asked by Anonymous in Astronomy & Space

2006-12-07 04:02:27 · 9 answers · asked by m and m 1 in Engineering

now, yet everything stayed the same size, your weight on earth would be the same, double, quadrule, or none of these?

2006-12-07 04:01:44 · 3 answers · asked by bramos100702 1 in Astronomy & Space

For instance, the use of antibotics, fossil fuels, the harnessing of electricity..etc.

2006-12-07 03:58:52 · 11 answers · asked by Anonymous in Earth Sciences & Geology