Science & Mathematics - 26 January 2007

a. 2x^2- 11x-21=0
b. 3x^2- 19x-14=0
c. 3x^2+23x+14=0
d. 2x^2+11x-21=0

2007-01-26 10:03:57 · 1 answers · asked by lana l 1 in Mathematics

evalute each expression by using the order of operations
48.)1*(3x)=-5x

44.)x(1/x)=1, where x=/ o

47.)0=2x+2x +(-22x)

2007-01-26 09:58:53 · 1 answers · asked by king 1 in Mathematics

evalute each expression by using the order of operations
48.)1*(3x)=-5x

44.)x(1/x)=1, where x=/ o

47.)0=2x+2x +(-22x)

2007-01-26 09:58:47 · 1 answers · asked by king 1 in Mathematics

an equivalence relation on S. Decribe the equivalence classes of S

2007-01-26 09:51:12 · 2 answers · asked by Ann T 1 in Mathematics

2007-01-26 09:50:14 · 20 answers · asked by Lãzý Šmû®ƒ 2 in Zoology

For science we can bring in food for extra credit to put into a vaccum chamber. Does anyone have any idea of what would look really cool in it?

For those of you that dont want to do other peoples homework you can help me. You get the same amount of extra credit points no matter what you bring in. I just want to bring something awesome in

2007-01-26 09:48:45 · 7 answers · asked by That One Guy 2 in Chemistry

GEOG

2007-01-26 09:48:21 · 4 answers · asked by bmw z 1 in Geography

Who likes the series show- Planet Earth.. In HD :D :D!!! I thinks its amazing..Nature in high definition, and the geographical scenes itself looks really nice.
What you think of this series? Its like National Geographic
Narrator of this series "Planet Earth"- David Atennbourgh

2007-01-26 09:46:21 · 2 answers · asked by Shawn Miller 1 in Astronomy & Space

I have a friend who seems to feel things. When we go out she gets feelings that she is going to see someone that she hasn't seen in a while and sure enough that person shows up. It's happened many times. And not only things like this but many others. She just feels things that I can never pick up. She freaks me out sometimes. Does anyone know someone like this?? And do u believe we all have this ability?

2007-01-26 09:45:58 · 53 answers · asked by c_sosa29 1 in Paranormal Phenomena

2007-01-26 09:40:52 · 3 answers · asked by Anonymous in Biology

Thanks

2007-01-26 09:40:43 · 4 answers · asked by Ilooklikemyavatar..exactly 3 in Geography

a. -2, 2/5
b. -2/5, 2
c. -1/5, 4
d. -4, 1/5

2007-01-26 09:39:43 · 6 answers · asked by lana l 1 in Mathematics

2007-01-26 09:33:45 · 6 answers · asked by goring 6 in Astronomy & Space

Listen i know that einstien says the we cannot break the light barrier or even attain the speed of light because u would need more energy then in the entire univerese to reach and also once the speed of light was reached u would become infintely massive but i cant help but think that he was just 1 man saying a Theory i mean i know he was brilliant but just becuase ur a genious doesnt make u right also from what i heard nobdy has really proved him right on this theory either i always hear the sentence Well Einstein says u cant for this reason and it is taken as well lack of a better term Bible truth. Does n e 1 else see that maddness of evryon1 just beliving a theory because a smart guy said it true? Help Me

2007-01-26 09:32:52 · 10 answers · asked by Anonymous in Astronomy & Space

No joke here, really!

I have this theory thats theres worm holes at all the adges of the universe so that the universe SEEMS neverending, but it isn't really, you just always turn up back at thebeggining!

Though this dosn't fit in with anything, even the big bang now that you think about it but oh well! The real question is, what do you think of this and do you have any conspiracies of your own?

2007-01-26 09:32:30 · 23 answers · asked by Anonymous in Astronomy & Space

how???

2007-01-26 09:32:27 · 12 answers · asked by Bardia 2 in Weather

Not sure on this problem...
14.Which one of the following illustrates the commutative property of addition?

A.

If a = b, then b = a.

B.

a(b + c) = ab + ac

C.

a + (b + c) = a + (c + b)

D.

a + (b + c) = (a + b) + c

2007-01-26 09:32:03 · 6 answers · asked by z1 2 in Mathematics

How does it work? i tryed to read it on wikipedia but it just sounded a lil over my head and i was just looking for a simpler explination.

2007-01-26 09:31:54 · 2 answers · asked by Anonymous in Physics

2007-01-26 09:29:58 · 2 answers · asked by Jaylan B 1 in Mathematics

I need to know, it's very vital to the future of mankind!

2007-01-26 09:26:28 · 11 answers · asked by Anonymous in Zoology

Let n>1 be an integer and suppose a,b є Zn+1 = {qn+1 : q є Z}.
Show that the product ab also belongs to Zn+1.
(Z is the set of all integers)
I'm not really sure how to go about starting this...

2007-01-26 09:24:38 · 3 answers · asked by yogastar02 2 in Mathematics

Geog

2007-01-26 09:24:02 · 5 answers · asked by bmw z 1 in Geography

2007-01-26 09:23:16 · 3 answers · asked by goring 6 in Astronomy & Space

i know it does, but i don't totally understand why!

2007-01-26 09:21:44 · 24 answers · asked by Anonymous in Mathematics

zone time

2007-01-26 09:21:33 · 9 answers · asked by bmw z 1 in Physics

2007-01-26 09:19:53 · 9 answers · asked by PiZzA 2 in Astronomy & Space

sex in space? Either for some experiment or for fun?

2007-01-26 09:19:46 · 4 answers · asked by Anonymous in Astronomy & Space

I would like to know what structures are involved or somewhere I can look to find the answer.

2007-01-26 09:18:42 · 3 answers · asked by Adrianne H 1 in Biology

I understand that if span A is a subset of span B, then all of the elements of A are in B. But I'm kind of confused as to how you go about showing that one span is a subset of another.

2007-01-26 09:15:49 · 2 answers · asked by 123123123 3 in Mathematics

In a physics experiment, a student places .3703 kg of copper in an insulated plastic tube 1.49 m long. The tube is inverted 373 times by the student. Assuming that the tube does not absorb any of the energy, what is the temperature increase of the copper in deg C?

How would you do this if they do not give you the original temperature of the copper??

2007-01-26 09:14:44 · 4 answers · asked by Anonymous in Physics