Science & Mathematics - 23 July 2007

(5,5)
m=-3

is this answer correct
y=-3-30x

and help me sollve
(-1,5)
m=-1

(-1,0)
m==2

2007-07-23 16:10:31 · 9 answers · asked by yoshi_gurl08 1 in Mathematics

A rock is thrown straight up with an initial speed of 8.00 m/s from the roof of a building 12.0m above the ground. For the motion from the roof to the ground, what are the magnitude and the direction of:

(a) the average velocity of the rock?
(b) the average acceleration of the rock?

2007-07-23 16:09:11 · 4 answers · asked by Imran 1 in Physics

I creating a anwser key for a couple worksheets. Thank you for all the help i get.

This all comes straight off the sheet.
Factor each expression. Be sure to write your answer in standard form.

1. n2 + 10n + 25 1)__________________________

2. r2 – 14r – 51 2)__________________________

3. 5x2 – 3x – 2 3)__________________________

4. 4n2 + 17n – 15 4)__________________________

5. 5x2 – 11x + 2 5) __________________________

6. 81x2 – 121 6) _________________________

7. 36t2 - 169 7) __________________________

8. 9x2 + 24x + 16 8) __________________________

9. 16x2 – 24x + 9 9) __________________________

Solve each equation by factoring. (3 points each)

10. (x + 8)(6x – 7) = 0 10) __________________________

11. 2n2 – 5n = 12 11) __________________________

12. (8y – 3)(4y + 1) = 0 12) __________________________

13. 6m2 = 13m + 28 13) __________________________

Word problems. Write your answer in simplest, standard form. ( 4 points each)

14. A rectangular sheet of paper has area 55 in.2. Its dimensions are (x + 2) in. by (x + 8) in. What are the dimensions of the sheet of paper.

14) __________________________

15. A banner is the shape of a right triangle of area 63 in.2. The height of the banner is 4 in. less than twice the width of the banner. Find the height and width of the banner.

15) __________________________

16. Suppose you are building a storage box of volume 4368 in.3. The box will be 24 in. long. The height of the box will be 1 in. more than its width. Find the height and width of the banner.

16) __________________________

2007-07-23 16:07:00 · 10 answers · asked by Allen 1 in Mathematics

how many U.S dollars is that?

2007-07-23 16:05:48 · 9 answers · asked by Anonymous in Mathematics

can anyone show me how to prove -i=1/i. thanx

2007-07-23 16:04:14 · 6 answers · asked by Anonymous in Mathematics

How many Euros will you receive?

80 Euros

100 Euros

120 Euros

187.50 Euros

2007-07-23 16:03:17 · 7 answers · asked by miss_unique16 2 in Mathematics

2007-07-23 16:02:03 · 5 answers · asked by Andreu 2 in Geography

2007-07-23 16:00:28 · 7 answers · asked by chris 1 in Medicine

2007-07-23 15:56:19 · 12 answers · asked by tkdgrl01 1 in Geography

2007-07-23 15:56:18 · 6 answers · asked by Anonymous in Engineering

im just wondering if the phd doctor has to take as many years of medical school as the medical doctor and if they become a doctor first?

2007-07-23 15:54:59 · 9 answers · asked by Anonymous in Medicine

Ok I know equivalence point is when amount of base or acid added is equal to amount of acid or base present. Does "amount" just mean volume of acid or base added = volume of acid or base present, or is it in moles??

2007-07-23 15:53:53 · 5 answers · asked by victoria 5 in Chemistry

2007-07-23 15:52:45 · 10 answers · asked by Erin J 1 in Biology

I have weight range ( in pounds ) of athletes and corresponding number of athletes in a camp in a overlapping manner

http://img522.imageshack.us/my.php?image=scan0004wg8.jpg

i want to find MINIMUM number of athletes in the camp .

please explain the logic of your answer

2007-07-23 15:42:59 · 3 answers · asked by calculus 1 in Mathematics

2007-07-23 15:42:49 · 5 answers · asked by kuey raye 1 in Astronomy & Space

2007-07-23 15:38:39 · 5 answers · asked by Martinez 1 in Mathematics

Really need help I am 12 almost 13. I want to get my mind to become an ASTRONAUT,

2007-07-23 15:32:06 · 5 answers · asked by Anonymous in Astronomy & Space

Joe Addicks is thinking about being the first person to take a Hot Air Balloon into outter space to dock with the Space Station. Does anyone think he will make it ?

2007-07-23 15:20:31 · 4 answers · asked by hawk_barry 6 in Astronomy & Space

i.e. when I asked Einstein's famous question about what someone would see while riding on the front of a beam of light, it said something about "seeing beyond the surface/appearance" (my interpretation of hexagram 22) and "a unity, greatness, balance in working together" (for hexagram 11, in context of the question). I don't know how to interpret further, and besides, the answer just feels like a clue...

2007-07-23 15:19:17 · 3 answers · asked by Anonymous in Chemistry

As a neutron contains: two d-1/3 and one u+2/3 quarks & a proton contains two u+2/3 and one d-1/3 quarks, what do the signs stand for? Is it positive and negative charge or mass?

2007-07-23 15:14:35 · 2 answers · asked by Larry K 1 in Physics

Last winter I saw a really bright star and called the folks over at the college to see if it was something I should worry about. They told me it was probably serious, so I went down to the Piggly Wiggly and stocked up on all the canned food they had. Shows you what college folks know. But now I'm stuck with the sirius problem of several cases of asparagus and okra about to go bad in my basement.

2007-07-23 15:11:37 · 7 answers · asked by That's not what I have seen. 2 in Astronomy & Space

thanks.

2007-07-23 15:10:47 · 1 answers · asked by lgbordergurl 1 in Botany

I'm not a scientist, but from what I've read, it doesn't seem that global warming isn't happening. Why do people think it's a lie?

2007-07-23 15:09:04 · 12 answers · asked by Anonymous in Earth Sciences & Geology

i'm building a generator powered by a bicycle that stores energy in a battery. however the battery tries to power the generator. this makes it spin opposite of the way it should. i need to overcome this and make it turn the way the wheel is turning (opposite of what the battery makes it do)

2007-07-23 15:08:31 · 4 answers · asked by Anonymous in Engineering

can aliens come to earth?

2007-07-23 14:59:46 · 10 answers · asked by ronald.carson 1 in Astronomy & Space

I'm doing modular arithmetic and can't figure this out!!

2007-07-23 14:56:26 · 3 answers · asked by Anonymous in Mathematics

2007-07-23 14:52:59 · 1 answers · asked by cherry 1 in Botany

2007-07-23 14:52:34 · 8 answers · asked by Anonymous in Other - Science

For all sets A, B, and C, Can anyone prove with a counterexample that IF A is a subset of B and B subset of C then A is a subset of C.

2007-07-23 14:51:39 · 4 answers · asked by Anonymous in Mathematics

I read this someplace on the net.

2007-07-23 14:48:37 · 18 answers · asked by godskidryan 1 in Zoology