Science & Mathematics - 21 July 2007

2x + y = 18
2x - y = 22
thanks

2007-07-21 07:37:44 · 7 answers · asked by Anonymous in Mathematics

x + 3y = 23
3x - 2y = 3

thank you for your help

2007-07-21 07:36:16 · 9 answers · asked by Anonymous in Mathematics

y = 5x
2x + y = 28

thank you

2007-07-21 07:34:40 · 3 answers · asked by Anonymous in Mathematics

I'm reposting this question in order to continue discussion on this matter. See original posted question:

http://answers.yahoo.com/question/index;_ylt=AqDfOmto4wKkfjyBks2D4Prty6IX?qid=20070716085410AANyufm&show=7#profile-info-uDRfzKDFaa

2007-07-21 07:34:15 · 2 answers · asked by Scythian1950 7 in Mathematics

There are lots of satellites circling the earth. I'm wondering, do they have a "life span" before they start to fall. Could they all be made to fail at once, and by what, and if they did fail, would they bombard the earth or burn up in the atmosphere? A screenplay depends upon the right answer.

2007-07-21 07:32:09 · 16 answers · asked by baldmikethepoet 1 in Astronomy & Space

2007-07-21 07:29:01 · 0 answers · asked by mualim 1 in Physics

I understand that, "A" blood carriers could have a genotype of "AO", but if a stain were left behind, it could not be just "O" correct?

2007-07-21 07:27:48 · 3 answers · asked by zillenium_00 3 in Biology

from space? water surface is flat isnt it?

2007-07-21 07:24:22 · 6 answers · asked by heartofglass 2 in Earth Sciences & Geology

i want it to become a physical sweeper but i don't know where to train help?

2007-07-21 07:24:01 · 1 answers · asked by George Cloony 1 in Geography

I was writing a song about acid rain and I want to put a sample in it, so I was wondering if thunder would be a good one

2007-07-21 07:23:20 · 4 answers · asked by Time Bomb 3 in Weather

2007-07-21 07:21:39 · 22 answers · asked by matt30 2 in Chemistry

Lea has a pizza business. The times to prepare and deliver pizzas are aprox. normally disributed w/mean =20 mins & standard deviation of 10 mins.
a) Suppose that leo advertises "If it take more than 30 mins to get your pizza, you get it free." What frarction of this take-out-pizzas will he have to give away free?
b) how long a time should Leo allow if he wants to give away no more than 5% of the pizzas?

2007-07-21 07:13:55 · 3 answers · asked by Anonymous in Mathematics

hint: convert grams of NaOH to moles of NaOH first

2007-07-21 07:13:05 · 3 answers · asked by Holly D 3 in Chemistry

2007-07-21 07:11:51 · 7 answers · asked by mualim 1 in Mathematics

2007-07-21 07:10:35 · 3 answers · asked by hope 5 in Physics

Somehow we've landed ourslelves with 3, 3 month old brolier chickens and were wondering if they will eventually lay any eggs?

2007-07-21 07:08:19 · 7 answers · asked by wave 5 in Zoology

Always

Sometimes

Never

2007-07-21 07:08:13 · 7 answers · asked by zerokun4 1 in Mathematics

In a diagram, show the chromosomal basis for recombination of linked genes.

Please show me a website that shows a diagram or explains this concept. Thanks.

2007-07-21 07:08:05 · 3 answers · asked by Anonymous in Biology

m^2+m + 1 =0
p^2 -4p + 4=0
2x^2 +5x+5=0
4/3x^2-3x+3/4=0

2007-07-21 07:05:32 · 4 answers · asked by littlesoutherner12 1 in Mathematics

8x/24

2007-07-21 07:05:20 · 8 answers · asked by gloriousnina 2 in Mathematics

2007-07-21 07:03:51 · 12 answers · asked by I C 1 in Mathematics

1. 4x^2 +7x-2

And how do I solve this by factoring?
2. 2x^2-9x-5=0

2007-07-21 07:01:43 · 15 answers · asked by gloriousnina 2 in Mathematics

is this only in the pacific or every beach

2007-07-21 07:01:13 · 2 answers · asked by Anonymous in Weather

2007-07-21 06:59:12 · 3 answers · asked by jack 1 in Mathematics

2007-07-21 06:49:36 · 9 answers · asked by daneris f 1 in Mathematics

2007-07-21 06:48:40 · 2 answers · asked by Bill W 【ツ】 6 in Geography

In number theory, which conjecture states a basic result regarding the rational number solutions of Diophantine equations?

2007-07-21 06:40:16 · 1 answers · asked by England 2 in Mathematics

2007-07-21 06:38:04 · 11 answers · asked by daneris f 1 in Mathematics

http://s194.photobucket.com/albums/z4/dbrine/?action=view¤t=t4q8.png

2007-07-21 06:37:09 · 2 answers · asked by Anonymous in Mathematics

I am SURE that I recall reading in a newspaper only a matter of months ago, about a country, which I cannot remember which one, was sending up special mercury bombs or something into clouds to cause rain. I KNOW I did read it.
I wonder if it worked but is continuing to send it all here by accident.

I know this sounds barmy, but what else could be causing flooding like this, I can never remember such a thing!

2007-07-21 06:36:37 · 17 answers · asked by SUPER-GLITCH 6 in Weather