Science & Mathematics - 8 September 2007

1.if the 1st difference of a sequence are a constant -7 & the 3rd term is 22, find the 1st 5 terms of the sequence.

or

2. explain how 2 work backwards from & constant 2nd difference 2 extend the following sequence: 1,6,16,31,51,76

9th grade, algebra math, honors. dont ask me to switch to normal classes cuz i wont...

2007-09-08 13:19:06 · 2 answers · asked by [[you're only selling sex now]] 3 in Mathematics

2007-09-08 13:18:07 · 10 answers · asked by Anonymous in Zoology

2007-09-08 13:16:48 · 5 answers · asked by Anonymous in Zoology

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2007-09-08 13:12:41 · 6 answers · asked by Anonymous in Mathematics

2007-09-08 13:11:34 · 19 answers · asked by Anonymous in Earth Sciences & Geology

2007-09-08 13:07:35 · 3 answers · asked by Chef Lau 2 in Biology

If a dice is rolled once, what is the probability that it will show a prime number (1 is not prime)?

2007-09-08 13:07:30 · 13 answers · asked by Anonymous in Mathematics

In the later 1880s, JJ. Thomson experimented with cathode rays by bending them in an applied electromagnetic field. He discovered that the charge/mass (e/m) ration was the same no matter what the cathode was made of.
a what did this suggest?
b what were these particles called?
c. what model of the aton's structure did he propose?

2007-09-08 13:02:09 · 3 answers · asked by Tammy 2 in Chemistry

You are in the northern hemisphere.

2007-09-08 12:59:47 · 3 answers · asked by Anonymous in Physics

He claims that there's some element found in large quantities on our moon that is scarce on earth and in poor quality. He said he seen it on the Discovery channel or some other science channel like that. I did a search and come up with nothing. From what he claims a chunk the size of a 1 liter soda bottle could power the average home for a year. I asked him if it was radioactive and he says no. I can think of no element that would provide power like he claims other than uranium, but that's radioactive. I know in school that we dropped the metal potassium into water in science class and it exploded. But I don't think potassium is rare on earth. Can someone help me find if this is true or if it is a myth?

2007-09-08 12:57:40 · 8 answers · asked by Andy 2 in Astronomy & Space

anyone found a good way to get rid of these?

2007-09-08 12:56:53 · 9 answers · asked by raven_roycroft 3 in Zoology

2007-09-08 12:53:33 · 5 answers · asked by road_goes_forever 1 in Zoology

It seems like it should just stop immediately when the flow of electricity is cut off. I was hoping someone could tell me more about the physics (of radio waves and/or electricity) that are involved.

2007-09-08 12:50:12 · 9 answers · asked by guiderock 2 in Engineering

2007-09-08 12:50:10 · 6 answers · asked by house_6688 1 in Mathematics

The container pictured below on the left is filled with water at 20°C, just to the overflow spout. A cube of wood with edges of 1.0 in. is floated on the water, and 10.8 mL of water is collected, as shown on the right. Calculate the density of the wood, and express your result with the maximum number of significant figures permitted in this experiment.

Picture: http://www.webassign.net/hpmp/1-72.gif

2007-09-08 12:45:52 · 3 answers · asked by unknownanonymous999 2 in Chemistry

Uses a needle more often ?

2007-09-08 12:45:36 · 8 answers · asked by Anonymous in Medicine

I have no idea how to figure this out-I've started it but keep getting confused. Please show me steps. Thank you so much!

2007-09-08 12:41:44 · 5 answers · asked by luckynluv001 1 in Mathematics

I keep coming up with two different answers, -2.5 and -4. Neither makes he equation true.

2007-09-08 12:40:29 · 20 answers · asked by shroomdaisy359 1 in Mathematics

M means moles

how do u figure out this question

2007-09-08 12:38:34 · 4 answers · asked by Anonymous in Chemistry

What is more damaging to the ears?

80 decibels with headphones or 80 decibels on a regular stereo. Or do they both damage the ears exactly the same amoung?

2007-09-08 12:35:23 · 3 answers · asked by bobo 2 in Engineering

c is a constant

2007-09-08 12:35:04 · 4 answers · asked by Anonymous in Mathematics

2007-09-08 12:30:06 · 13 answers · asked by Anonymous in Medicine

How are the halogen electron configuratons similar?

2007-09-08 12:27:38 · 2 answers · asked by Anonymous in Chemistry

I have to this hard homework and one of my question was that and i can find the answer!! And its going to get me mad!

2007-09-08 12:26:17 · 2 answers · asked by Cristina123 1 in Physics

Need to round answer to three decimal places. Cannot get this answer!!

2007-09-08 12:25:42 · 3 answers · asked by luckynluv001 1 in Mathematics

WORST MATH EVER AND I NEED HELP SQUARE EACH MONOMIAL
(A2)2=
(RS )2=
( -5Y4 )2=
(10X 2 Y 2 ) 2=

2007-09-08 12:23:27 · 1 answers · asked by chris l 1 in Mathematics

Okay i dont understand this can you please help me what would the hundred term be

http://img211.imageshack.us/img211/6366/mathhz8.png

please explain how you got your answe

2007-09-08 12:21:15 · 5 answers · asked by Anonymous in Mathematics

I have a few out of a hundred if anyone is willing to help me out and also explain the steps? Thank you in advance!

1) In what quadrant does the point (-2,5) lie?

2)Simplify: 3 times square root of 63

square root of 10 times (square root of 2 plus 2)

3)Find the hypotenuse when two legs of a right triangle are 6cm and 3 cm.

4) Solve for y: y-4 =3
x+3 4

5) factor: x squared-5x+6

6) let y= x squared +2x-3

7) Solve for x by taking the square root of both sides: (x-2) squared = 9

I know it's a lot and thank you again!

2007-09-08 12:20:40 · 4 answers · asked by Anonymous in Mathematics

how do u use the forula y=Mx+b

2007-09-08 12:14:47 · 7 answers · asked by dodgerpup373 2 in Mathematics

hey i have to do a project for science and i was wondering who discoverd gold like the orignal person to descover it
i looked but i cant find anything please help me

2007-09-08 12:13:18 · 7 answers · asked by sexyprep852 1 in Chemistry