Science & Mathematics - 19 November 2006

solve these simutaneouse equations

1. 3 y - 8 x =24
3 y - 2 x = 9


2. y = 13 - x
3x + 2y =16

last one

3. y+1 =2x
y = x + 2


plz help show ur working so i understand

2006-11-19 08:55:16 · 9 answers · asked by laura 1 in Mathematics

2006-11-19 08:54:49 · 2 answers · asked by Anonymous in Botany

In Austria there is a rumor that many Americans don't know where my home country is - or just got to know it when Arnold Schwarzenegger became gouverneur in California?
Do you agree or disagree?

greetings from Austria

2006-11-19 08:54:14 · 8 answers · asked by Rika 2 in Geography

yes or no and Y

Dont say i will die

2006-11-19 08:53:30 · 2 answers · asked by Anonymous in Physics

How can I prove that:
1/(sec X + tan X) = Sec X - Tan X

What I tried to do (but I can't get to the prove) is:

1/ (1/cos + sin/cos) = (1/1)/(1+sen/cos) = cos / 1 + sen = 1 / (sec + sen) = cos + csc

What procedure do you suggest so I can get to Sec X - Tan X ?
Thanks.

Also, is there any way to check my procedures in Mathematica for Students?

2006-11-19 08:52:41 · 5 answers · asked by ddeity_inc 3 in Mathematics

I have read the post about the chemical equation for making formalin, but I have been trying to come up with an actual working equation for mixing up my own formalin solutiuon from a 52% formaldehyde solution,100% methanol solution, and water. It never seems to come out right, I think there must be some sort of solubility issue that makes my equation invalid. Anyone have any suggestions?

2006-11-19 08:51:59 · 2 answers · asked by cadisfly74 1 in Chemistry

solve these simutaneouse equations

1. 5 x - 4=4y
2y + 2 = x


2. 3 x + 8 y +24
x+y=3

plz show me the wrkings so i understand thank you xx

2006-11-19 08:51:51 · 9 answers · asked by laura 1 in Mathematics

2006-11-19 08:51:41 · 4 answers · asked by Duffman 5 in Geography

2006-11-19 08:51:05 · 1 answers · asked by LadyLeo 1 in Physics

its (4n) with 2 as the exponet right next to the n

2006-11-19 08:51:04 · 2 answers · asked by dodgers 1 in Mathematics

2006-11-19 08:49:43 · 17 answers · asked by kiedokl 2 in Geography

2006-11-19 08:49:11 · 5 answers · asked by MaraAsta_Jedi 2 in Chemistry

2006-11-19 08:47:36 · 3 answers · asked by melanie m 1 in Engineering

I want to write a short blurb on polar reversal. I saw a film on this in a geology class twenty years ago - they were using lava flow on the ocean floor to prove the poles had reversed several times and then dug up several ancient aboriginal campfires that had melted rock to prove that it had happened while humans were on earth. But every time I try to yahoo it all I get are religious sites. Thanks!

2006-11-19 08:47:22 · 1 answers · asked by jane7 4 in Earth Sciences & Geology

2006-11-19 08:47:10 · 3 answers · asked by Wicus v 1 in Earth Sciences & Geology

these are the articulations between the superior articualr facets and the inferior articular facets of the vertebrea. i was told that they are synovial hinge joints but it is so hard to picture them opening and closing...

2006-11-19 08:46:27 · 4 answers · asked by girlwiththegoodies 3 in Medicine

WWUD= what would you do
No screaming and No getting out of elevator
Its locked tight and your weightless
no jumping either cause they aint gonna work

2006-11-19 08:43:39 · 7 answers · asked by Anonymous in Physics

2006-11-19 08:43:11 · 1 answers · asked by soccawalka5 2 in Chemistry

2006-11-19 08:42:46 · 7 answers · asked by STORMY K 3 in Astronomy & Space

find difference between animal cell and plant cell
please and thank u

2006-11-19 08:42:09 · 1 answers · asked by sherry s 1 in Botany

A) S-H
B) H-I
C) H-Cl
D) H-H
E) Br-H

2006-11-19 08:41:12 · 4 answers · asked by ruby 2 in Chemistry

2006-11-19 08:41:03 · 11 answers · asked by kiedokl 2 in Geography

on a math test, the average for the score of 18 boys was a (as in the variable a... not A), and the average for the 19 girls was b (same thing... VARIABLE b). The whole class average was c.

2006-11-19 08:40:39 · 9 answers · asked by Anonymous in Mathematics

5.51 g of the compound fills a 179.0 ml bottle with a pressure of 5183.3 mm Hg at a temperature of 24.4oC. What is the molecular formula of this compound ?

2006-11-19 08:37:51 · 2 answers · asked by geebgeebgeeb 1 in Chemistry

how are plates moving at Kona?
What specific plates is Kona near/on?

2006-11-19 08:37:31 · 3 answers · asked by whitesoxfan111 1 in Earth Sciences & Geology

138 g of C3H8 at 25.0oC and 100.0 kPa?

2006-11-19 08:36:00 · 2 answers · asked by geebgeebgeeb 1 in Chemistry

Explain how astronomers are able to tell which elements are present in distant stars by analyzing electromagnetic radiation emitted by the stars.

2006-11-19 08:33:51 · 6 answers · asked by avalentin911 2 in Astronomy & Space

2006-11-19 08:28:45 · 17 answers · asked by xboxturbo 3 in Other - Science

2006-11-19 08:28:24 · 11 answers · asked by Dave 1 in Astronomy & Space

Is it possible for a fluorescent material to emit radiation in the ultraviolet region after absrobing visible light?

2006-11-19 08:27:32 · 1 answers · asked by avalentin911 2 in Chemistry