Science & Mathematics - 22 October 2007

I know that I use SSS, SAS, ASA, HL, and AAS to see if two triangles are
congruent. I also know that SSA is not supposed to be used. The basic way
to use it is using HL, with a right triange. I also was told there was
another example of two congruent traingles with SSA that are not right
triangles.

2007-10-22 10:52:21 · 2 answers · asked by Multiworld 2 in Mathematics

And where's my friend Serafim??

Thank you for your answers!

God night/day!

2007-10-22 10:49:12 · 17 answers · asked by Moon :) 7 in Geography

2007-10-22 10:46:55 · 10 answers · asked by DJared 2 in Mathematics

A tennis ball is launched with an initial velocity of 24.5 m/s from the edge of a cliff that is 117.6 meters above the ground. Which quadratic equation could be used to correctly determine when the ball will hit the ground:


4.9t2 + 24.5t + 117.6 = 0
-4.9t2 - 24.5t + 117.6 = 0
-4.9t2 + 24.5t - 117.6 = 0
4.9t2 + 24.5t - 117.6 = 0
-4.9t2 + 24.5t + 117.6 = 0

could you please explain how u got your answer?

2007-10-22 10:45:37 · 3 answers · asked by Anonymous in Mathematics

sqroot of (2x + 1) - square root of ( x ) = 1

Please explain how you got the answer if you have time. I'm preparing for a test. Thanks a bunch.

2007-10-22 10:44:13 · 9 answers · asked by Anonymous in Mathematics

I need these answers by Friday!!! This is hard stuff!!!!!! Plz help! If u can!!!!!!

2007-10-22 10:44:07 · 4 answers · asked by nicole♥ 3 in Earth Sciences & Geology

There should be 3 solutions, I got 2... x = a - square root of x and x = a^2 - 2ax + x^2.

2007-10-22 10:39:11 · 1 answers · asked by amy 1 in Mathematics

Complete each patter.

1. 25,___,61,___,97
2. 87,___,43,___,-1
3. 21,___,49,___,77
4. 64,___,___,___,32,24
5. 61,66,71,76,81,86 (is this one right i did that one)

2007-10-22 10:37:45 · 5 answers · asked by Lilly 2 in Mathematics

possible answers are 0,10,15,35

2007-10-22 10:34:15 · 7 answers · asked by christian s 1 in Mathematics

I was just curious :]
Like in their every day job how do they use it?

2007-10-22 10:33:22 · 4 answers · asked by Valerie 2 in Engineering

I dont understand it and I have looked it up in my book several times...how do I solve this?

a+b=16;b

thanks!!!

2007-10-22 10:29:01 · 4 answers · asked by Anonymous in Mathematics

∛-8/27 I have to evaluate this it is 3 sqrt-8/27
√4/25 and evaluate this
√-121 and this I thought I was looking for one answer such as √-121 which would be 11i but I got these wrong so what is he looking for as an answer so lost.

2007-10-22 10:28:40 · 1 answers · asked by chas_lynn2002 2 in Mathematics

How do I solve the problem.

2007-10-22 10:26:53 · 15 answers · asked by sohogurl 1 in Mathematics

the only materials that can be used are cardboard, tape and glue. the project must be a light weight because the more the project weighs in GRAMS the more points taken off from 650. so it has to weigh as light as possible. the project will FREE FALL from the top of the bleachers of high school stands. the project must hit the target below and there will be a time limit of getting the egg out of the project and if the egg breaks in that process, it's a fail. There shouldn't be anything on the egg (no tape, no glue) when presenting it to the teacher before the egg is dropped and after it is dropped. the teacher should be able to take a sharpie marker and make a mark on the egg while the egg is in the project before it is dropped. this project is due Oct 26, 2007! please help!!!

2007-10-22 10:24:12 · 4 answers · asked by Anonymous in Physics

Okay, for anyone that is good at linear programming, I have a question. Well, there's this problem I'm stuck on, and I need help on a few things on it. Here's the problem:
X is the mathematician for Y's Oil Refinery. Y can buy Texas oil, priced at $30 a barrel, and California oil, priced at $15 per barrel. He consults X, the mathematician, to find out what is the most he might have to pay in a month for the oil the refinery uses. Sabrina finds the following restrictions on the amounts of oil that can be purchased in a month. The refinery can handle as much as 40,000 barrels per month.
To stay in business, the refinery must process at least 18,000 barrels a month. California oil has 6 pounds of impurities per barrel, while Texas oil has 2 pounds. The most the refinery can handle is 120,000 pounds of impurities a month. Y spends at least $660,000 per month buying oil.

What would be the constraints for this problem? That's all I need to know. I think I did something wrong.

Thanks

2007-10-22 10:23:06 · 1 answers · asked by Anonymous in Mathematics

Anyone here knows how did man discover how large is the earth?
Need this answer for science class.

2007-10-22 10:21:19 · 1 answers · asked by Anonymous in Earth Sciences & Geology

2007-10-22 10:20:13 · 4 answers · asked by Anonymous in Earth Sciences & Geology

2007-10-22 10:18:04 · 3 answers · asked by Anonymous in Biology

Samething with y= ax^2+bx+c
abc are constants, and x is a variable. Is that the same for y=mx + b. How do you find x for y=mx+b?

2007-10-22 10:15:52 · 7 answers · asked by Anonymous in Mathematics

I was told that aluminum cans need to be full size in order for the magnets to induce current into the cans better and give enough force to adequately separate them. I did a search and could not find any info verifying this. It seems odd to me that it would make that much of a difference or that the equipment couldn't be designed to work well with crushed cans.

2007-10-22 10:15:14 · 2 answers · asked by reDSP 2 in Engineering

2007-10-22 10:15:04 · 2 answers · asked by Anonymous in Biology

2007-10-22 10:08:56 · 5 answers · asked by Anonymous in Astronomy & Space

derivative of

f(t)=(2t)/(4+t^2)

y= (t^3 + t)/ (t^4-2)

y=( x^(1/2)-1)/ (x^(1/2)+1)

2007-10-22 10:07:18 · 2 answers · asked by pooja a 1 in Mathematics

Simplify this expression. Type the variable term before the constant term.

12 + 3(4 + x)

7(2x + 1) - 7

4(3x + 3) - 10

2007-10-22 10:05:03 · 2 answers · asked by Anonymous in Mathematics

2007-10-22 10:03:21 · 4 answers · asked by Anonymous in Biology

is an object mass on the moon the same as on the earth?

2007-10-22 09:59:44 · 6 answers · asked by bananaz 1 in Astronomy & Space

2007-10-22 09:59:09 · 7 answers · asked by tcooper19 1 in Mathematics

2007-10-22 09:59:03 · 12 answers · asked by Anonymous in Astronomy & Space

ive looked on google but nothing please help

2007-10-22 09:58:48 · 2 answers · asked by Anonymous in Engineering

Na2CO3 (aq)+HCl(aq) --> ???

I got all the other ones I need, but this one is stumping me...
=[ thanks for your help!

2007-10-22 09:58:11 · 2 answers · asked by bafisch89 1 in Chemistry