Science & Mathematics - 31 August 2007

(5,-2) and (6,7)

2007-08-31 09:56:06 · 4 answers · asked by rigo201113 1 in Mathematics

how do i find the domain of : 3x-7y=13

2007-08-31 09:54:58 · 2 answers · asked by XXyeaaboiiiXX 2 in Mathematics

2007-08-31 09:52:05 · 11 answers · asked by DeGener8 1 in Mathematics

here is the problem

9p^2=-21p-6

heres what i did. i made it -9p^2-21p-6=0

i'm doing the "if it isnt a "1" before the variable technique and getting nowhere close to what the answer in the the back of the book says.

can anyone explain how to solve this? thanks.

2007-08-31 09:51:20 · 6 answers · asked by brobrahbro 1 in Mathematics

I was wondering how come i yawn and then my friend yawns or sometimes that happens even with my dog and i. thanks for all of yalls help!

2007-08-31 09:49:23 · 6 answers · asked by Freedom 3 in Medicine

2007-08-31 09:48:48 · 4 answers · asked by merya 1 in Engineering

I live in south-eastern Minnesota and i was at a gymnastics center and I saw this dark Purple/ blackish spider, it was about the size of a dime and it has white crosses or X's on its back. i was wondering if anyone knows what kind it is

2007-08-31 09:47:38 · 3 answers · asked by evogbro2 2 in Zoology

2007-08-31 09:47:06 · 7 answers · asked by Perky_gurl 4 in Earth Sciences & Geology

|xe^3xdx, |2xcos(3x)dx, |7xln(3x)dx

2007-08-31 09:46:44 · 4 answers · asked by garrett m 1 in Mathematics

2007-08-31 09:42:58 · 0 answers · asked by Humble Bee 2 in Medicine

how is he maintaining a speed of 70mph and flying circles around my head?

2007-08-31 09:41:32 · 10 answers · asked by G M 1 in Mathematics

A small company produces both doll houses and sets of doll furniture. The doll houses take 3 hours of labor to produce, and the furniture sets take 8 hours. The labor available is limited to 400 hours per week, and the total production capacity is 100 items per week. Existing orders require that at least 20 doll houses and 10 sets of furniture be produced per week. Write a system of inequalities representing this situation, where x is the number of doll houses and y is the number of furniture sets. Then graph the system of inequalities.

thank you

2007-08-31 09:40:03 · 2 answers · asked by Marina P 1 in Mathematics

The 10 kg block is acted upon by a horizontal force of 100 N. Coefficent of static friction=0.60, coefficient of kinetic fricton =0.40, g=9.8 m/s2.

2007-08-31 09:39:59 · 4 answers · asked by Anonymous in Physics

i've always been the type that could see and feel things that are supernatural, i was just wondering if there are signs that say if i am a Medium or a psychic

2007-08-31 09:39:29 · 13 answers · asked by Elizabeth D 1 in Paranormal Phenomena

When a camera flash goes off, the batteries immediately begin to recharge the flash's capacitor, which stores electric charge given by the following. (The maximum charge capacity is M and t is measured in seconds.)
Q(t) = M(1 - e^-t/a)
(a) Find the inverse of this function and explain its meaning.
t(Q) =

Q(t)=M(1-e^-t/a)
(Q/M)=-e^-t/a
ln(Q/m)=-(-t/a)
ok so now is it
ln(Q/M)=t/a (since it is -e^-t/a so is it -ln(e^-t/a) or is it ln(-e^-t/a)??

2007-08-31 09:37:42 · 1 answers · asked by m_carl 1 in Mathematics

ok please answer this math questions!! :)


solve each equation or formula for the variable specified.

1. 3x - 4y =7, for x

2. a(y + 1) = b, for y

3. ex - 2y = 3z, for x

4. 3/5y + a = b, for y

y = mx + b,for m

2007-08-31 09:35:24 · 6 answers · asked by cali hollister chick 1 in Mathematics

Suppose a piece of lead with a mass of 14.9 g at a temperature of 92.5C is dropped into an insulated container of water. The mass of water is 165 g and its temperature before adding the lead is 20.0C. What is the final temperature of the system?

This is what I have so far...

q = (m) (T) (Cp) = (14.9g) (92.5C - Tf) (0.449 J / g * C)
q = (m) (T) (Cp) = (165g) (Tf - 20.0C) (4.184 J / g * C)

I have been working on this problem for 2 days now and I am having alot of trouble getting an answer. Help is highly appreciated!

Thanks so much!

2007-08-31 09:31:48 · 1 answers · asked by hotlilmamax2 1 in Chemistry

2007-08-31 09:26:10 · 7 answers · asked by Anonymous in Astronomy & Space

pleaseeee help. kthanks.

2007-08-31 09:25:00 · 9 answers · asked by manly b 1 in Mathematics

2007-08-31 09:18:38 · 2 answers · asked by GCTA 4 in Chemistry

At the right altitude would one jump from everyone on the plane change it's trajectory?

2007-08-31 09:18:07 · 5 answers · asked by babycakes2877 2 in Physics

Will it be a cold, or snowy or warm winter for NYC and the eastcoast. How will this winter be. What are the predictions for the winter of 2007-08 later this year.

2007-08-31 09:15:06 · 3 answers · asked by Anonymous in Weather

okay i didn't really have much room in the question to make it perfectly clear: Prove that if a point lies on the two ends of a line segment, the point lies on the perpendicular bisector of that segment. I get why, I just don't know how to prove it. Thanks so much. Even just a start would be great!

2007-08-31 09:14:30 · 7 answers · asked by whaddyaknow? 4 in Mathematics

please tell me your opinion?

2007-08-31 09:11:12 · 6 answers · asked by Alexander 6 in Physics

Thanks for the help!

2007-08-31 09:09:58 · 6 answers · asked by garrett m 1 in Mathematics

Hot enough to melt aluminum ore?

2007-08-31 09:09:27 · 5 answers · asked by mark d 2 in Earth Sciences & Geology

What do you people think about this global warming stuff? Do you think it's true? There's been a lot of debate on this subject. Is it really true that the increase of CO2 levels are made by emissions from our cars and such? Or is it from the sun bursting its gamma rays like Micheal Savage says?

2007-08-31 09:09:26 · 8 answers · asked by Anonymous in Earth Sciences & Geology

Hot enough to melt aluminum ore?

2007-08-31 09:08:46 · 2 answers · asked by mark d 2 in Earth Sciences & Geology

Hi,

Has parapsychology ever found something about the psychic phenomena?
Has someone ever gained the award from James Randi Educational Foundation?

PLEASE DO NOT ANSWER WITH LINKS.
BUT SHOW YOUR SOURCES WITH LINKS.

Thanks a lot.

2007-08-31 09:03:40 · 8 answers · asked by survey taker 2 in Parapsychology

how many girls are there?

2007-08-31 08:59:12 · 13 answers · asked by kevin m 1 in Mathematics