Science & Mathematics - 13 July 2007

given f(x) = 2x - 5, find f(a + 3)

I get the answer of 2a + 1..i did 2(a+3) -5=
2a + 6 - 5
please advise someone..

2007-07-13 13:29:26 · 7 answers · asked by Anonymous in Mathematics

2007-07-13 13:27:19 · 4 answers · asked by Anonymous in Geography

2007-07-13 13:12:27 · 11 answers · asked by Anonymous in Mathematics

log(Sub)4 (x^2 - 9) - log(sub)4 (x+3) = 3

solve the equation.

how would I do this one?? please help, explain thanks

2007-07-13 13:05:37 · 6 answers · asked by Anonymous in Mathematics

2007-07-13 13:00:35 · 23 answers · asked by Ahwell 7 in Astronomy & Space

2007-07-13 12:48:10 · 2 answers · asked by sneaky comet 3 in Zoology

2007-07-13 12:40:01 · 8 answers · asked by Anonymous in Mathematics

Firstly, if I were to set an ordinary cellphone on fire, would it pose a serious hazard? That is to say, does a cellphone (non-color screen, no camera or mp3 capabilities) contain any parts which may explode or present any other serious hazard to the participants of this stunt upon exposure to flame?

Secondly, is vinegar flammable? If not, can anyone recommend any common household liquids which may have the desired effect?

Thanks

2007-07-13 12:39:26 · 8 answers · asked by Anonymous in Chemistry

Please can someone help me with this chemistry?

2007-07-13 12:34:35 · 4 answers · asked by Anonymous in Chemistry

√ Doesn't make sense.
My question:
1) √15√24√30=

my work: √5*3*√6*4*√15*2= √5*3*2√6*√15*2

2) How come if the √ square root is the opposite of square than how does my √15*2= √30 makes sense? (I cant even simplify it now) THEY DONT HAVE ANYTHING IN COMMON!

3) What is wrong with my: √5*3*2√6*√15*2 ???

I put the 2 outside the radical because it is actually 4 cause 2²=4.

2007-07-13 12:27:47 · 5 answers · asked by Anonymous in Mathematics

If it is high altitude air, meaning lower pressure, how does it manage to descend in the first place? And as it descends, should it not warm up?

2007-07-13 12:26:19 · 6 answers · asked by Anonymous in Weather

2007-07-13 12:12:55 · 4 answers · asked by pen 1 in Engineering

My grandmother had brought live crabs for a bbq once (we want them fresh!) And she had yanked off the claws (which im amazing since i would be scared to death!)

I realized that they didnt bleed at all!

Later DURING the barbeque, i had asked my parents why it didnt bleed. We (well I) came to the conclusion that crabs dont bleed cause they dont have a heart. But that makes no sense!

2007-07-13 12:11:10 · 6 answers · asked by Anonymous in Zoology

[1/2 (cos pi/10+ i sin pi/10]^5

2007-07-13 12:08:29 · 3 answers · asked by jessie0420 2 in Mathematics

Mine is the wasp or the mosquito as neither have any importance.

2007-07-13 12:05:42 · 25 answers · asked by pups 5 in Zoology

Find the arithmetic men between 2.5 and 9.5

2007-07-13 11:55:57 · 2 answers · asked by °†¿ÐámñéÐ?†° 2 in Mathematics

please no answers like "i dont know" i came here for help not sarcasim please

2007-07-13 11:55:07 · 8 answers · asked by °†¿ÐámñéÐ?†° 2 in Mathematics

We have this I.P. to make, so can somebody help my group?

2007-07-13 11:50:37 · 2 answers · asked by Anonymous in Earth Sciences & Geology

Prove the following questions please and please discuss it so I can understand it Thanks you.

cos(x+y)secy =sinx (cot x-tan y)


Cos (x+y)+cos(x-y)=2 cos x cos y

2007-07-13 11:50:03 · 4 answers · asked by In Flames I Lay Dying 3 in Mathematics

2007-07-13 11:47:54 · 2 answers · asked by Anonymous in Mathematics

Hypothetically speaking.

If I were planning to spend $100 on lottery scratch off tickets that cost $5 each or 20 tickets total. The odds of winning are 1 in 3.81. To better my chances of winning... would it be statisally better to buy all the 20 tickets at 1 store or to buy 1 ticket at 20 different stores.

2007-07-13 11:40:58 · 4 answers · asked by kristy s 1 in Mathematics

2007-07-13 11:37:16 · 30 answers · asked by xx Becs xx 1 in Astronomy & Space

I am looking for a technology or a device that would enable me to measure the distance between a Base point and the remote node of the device. It should supply me the measurement continuously (like 50 times a second). It doesn't have to be a released product. A technology or a method would be fine.
I am thinking of a radio emitter and a material to reflect it. And calculate the time it bounces back and find the distance. Or calculate the amount of decrease of the power of the signal.
I can pay about 100-500$ for a good answer.

2007-07-13 11:34:04 · 7 answers · asked by Anonymous in Engineering

This is the book used in Calc 3 at UF. I would like to get a pdf version that I can get immediately to prepare for Monday's test. Can anyone help me out?

2007-07-13 11:33:15 · 4 answers · asked by Fred 1 in Mathematics

A horse's feed requires both hay and oats, and a horse weighing 980 pounds requires 21.6 pounds of feed a day. The ratio of hay to oats is 17:3. How many pounds of oats does a horse need in a day?

2007-07-13 11:33:14 · 5 answers · asked by Anonymous in Mathematics

thank you for your time and help

2007-07-13 11:29:30 · 5 answers · asked by na 2 in Earth Sciences & Geology

Okay, i wanted to know if anyone has heard of th e dna change that is suppose to happen...That children are being born with more then two dna helixes (up to twelve)... and also about the indigo children ...

2007-07-13 11:23:16 · 4 answers · asked by dee 1 in Biology

Unusual thing that can't seem to be figured out...

2007-07-13 11:21:52 · 22 answers · asked by furshluginer 2 in Paranormal Phenomena

Can anyone describe--and give evidence of--any universal truths outside of these four claims:

Time exists.
Space exists.
Energy exists.
Matter exists.

Isn't everything else just a derivative of one or more of these four things? Please, only include what you believe to be universal truth that can be substantiated with empirical evidence or logical reasoning. I'm willing to hear out any long-winded examination.

2007-07-13 11:19:57 · 6 answers · asked by the_way_of_the_turtle 6 in Other - Science

2007-07-13 11:17:10 · 7 answers · asked by lovechild 1 in Mathematics