Science & Mathematics - 1 September 2007

2x^2 - 4x +1 = 0
could you show how this problem is done also

2007-09-01 12:17:09 · 4 answers · asked by Anonymous in Mathematics

2007-09-01 12:12:44 · 6 answers · asked by Anonymous in Zoology

which are identical?

1. a) cos^2 x b) (cosx)^2 c)cos x^2

2. a) (sinx)^-1 b) arcsinx c) sin x^-1 d) 1/(sinx)




thanks in advance for the help!!

2007-09-01 12:11:42 · 3 answers · asked by Anonymous in Mathematics

if a is 50% larger than c, and b is 25% larger than c, then a is what percent larger than b?

explain!?!?!?! i really need help

2007-09-01 12:10:56 · 10 answers · asked by Anonymous in Mathematics

chimps/apes or dolphins

i think chimps are smarter but im not sure

2007-09-01 12:09:00 · 11 answers · asked by Big Will 2 in Zoology

Assuming you are not hit with shrapnel from the bomb itself, and are not killed by any other type of debris what actually kills you when a bomb is detonated near you?

2007-09-01 12:03:39 · 9 answers · asked by Cheeks 2 in Physics

3 square root of 2 and 2 square root of 3|

2007-09-01 12:02:37 · 10 answers · asked by avenger 2 in Mathematics

where i live,its been more than 100 degrees all week...the air conditioning isnt doing much & now the sun's gone & its raining but its still so freakin hot & humid!!!
how do i cool down? i cant go swimming & i'm drinking water but its not much help..

2007-09-01 12:01:53 · 5 answers · asked by cloud16 4 in Weather

Multiply and simplify. Assume no denominator has a 0 value.



x^2 - 2x - 3/ x^2- 3x X x^2/x^2 - 1

2007-09-01 12:00:37 · 4 answers · asked by Anonymous in Mathematics

2007-09-01 12:00:11 · 4 answers · asked by avenger 2 in Mathematics

1. x^2+6x+9/ 30 divided by x+3/10


2. 2x^2+7x-15/x+5 divided by 9x^2-4/3x+2

2007-09-01 11:58:03 · 3 answers · asked by Anonymous in Mathematics

factor this 2x^2-x-3 and this 5x^2+34x-7
both are 2 different questions

2007-09-01 11:57:05 · 5 answers · asked by mercedes'08 1 in Mathematics

Divide and simplify. Assume no denominator has a 0 value.

x^2-5x+6/x+5 divided by x+1/x+5

2007-09-01 11:53:13 · 5 answers · asked by Anonymous in Mathematics

One day, the temperature at 2:00 A.M. was 43°F, and by 3:00 P.M. the temperature was 56°F. What was the hourly rate of temperature change? I got 2f/h, but I do not feel this is correct....anyone confirm? Show me what I am doing wrong?


And this one i sBUGGING ME as well!
Find two consecutive integers such that the sum of 2 times the first integer and 7 times second integer is 88.

2007-09-01 11:51:59 · 7 answers · asked by ? 1 in Mathematics

1. Factor completely: x^2 + 10x + 25
2. Factor completely: 2x^2 - x - 10
3. Factor completely: x^2 + 6x + 9

2007-09-01 11:50:31 · 5 answers · asked by Anonymous in Mathematics

points

2007-09-01 11:45:27 · 17 answers · asked by THE GOOD NIGHT 6 in Geography

looking for the comparison and then finaly the conclusion about the water pumps instaaled in the IC engines. Where we should stick to the tradional mechanical driven water pumps or electrical water pumps? which one is better!! any information/ response is appreciated

2007-09-01 11:36:54 · 4 answers · asked by xirconiumz 1 in Engineering

2 + 6 + 18 + ... + 2 * 3 to n-1 power = 3 to n-1 power

use mathematical induction to prove the statement are true for every positive integer n.

2007-09-01 11:32:12 · 3 answers · asked by clavezza28 2 in Mathematics

Henry Gee, chief science writer for Nature, wrote in 1999: “The intervals of time that separate fossils are so huge that we cannot say anything definite about their possible connection through ancestry and descent.” Although Gee is a believer in Darwin’s theory, he acknowledged that one must assume the truth of the theory when studying human origins, because by its very nature the fossil record cannot corroborate it. Gee concluded: “To take a line of fossils and claim that they represent a lineage is not a scientific hypothesis that can be tested, but an assertion that carries the same validity as a bedtime story--amusing, perhaps even instructive, but not scientific.”

Also there is the lack of high level models for macro evolution. Some proposes Theoretical Genetics, but it applies to micro evolution only. http://www.genetics.org/cgi/content/full/169/1/1
Known mechanisms turn on/off complex information *already available*: http://ucsdnews.ucsd.edu/newsrel/science/mchox.htm

2007-09-01 11:19:26 · 11 answers · asked by My account has been compromised 2 in Biology

atomically speaking, how could glass, plastic, etc. be transparent?

2007-09-01 11:13:33 · 2 answers · asked by mr. answers 2 in Other - Science

I'm curious to know about the zeta reticuli grey aliens. I've read on some random websites that they resemble praying mantises, and that are good species and evil species of these aliens. Can anyone please enlighten me me more and perhaps direct me to legitmate websites where I can learn more about this subject. Thanks very much!

2007-09-01 11:12:50 · 17 answers · asked by Jowe 1 in Paranormal Phenomena

2007-09-01 11:08:37 · 3 answers · asked by ohmygoditsanne 1 in Zoology

2007-09-01 11:04:13 · 4 answers · asked by Anonymous in Zoology

2007-09-01 11:04:07 · 6 answers · asked by Anonymous in Mathematics

2007-09-01 11:01:24 · 4 answers · asked by Anonymous in Mathematics

I found a beautiful white (almost transparent) spider under the vent visor of my car. I have tried to look for pictures of him on the internet but have found nothing what he looks like. If need be I can post a link to the picture I took of him a bit later.

2007-09-01 10:48:36 · 7 answers · asked by lyfsavr1 3 in Zoology

what was the main problems you face? dose the concentration of the genomic DNA affects the results? any advises or recomended reading about the procedure.

2007-09-01 10:47:28 · 2 answers · asked by dan 1 in Biology

solve the following equation by using the quadratic formula.

y^2-6y+11=0

2007-09-01 10:45:48 · 3 answers · asked by What's up people!! 1 in Mathematics

Factor: 6x^2 -17x +5

Simplify: (6m^4-2) -(2m^3-1) + (4m^4-6m^3)

Use Linear combinations to solve the linear system
3x+2y=-5
4x-3y=16

2007-09-01 10:42:51 · 3 answers · asked by Anonymous in Mathematics

3p - 1 = 5(p-1) - 2(7-2p)

2007-09-01 10:38:29 · 8 answers · asked by What's up people!! 1 in Mathematics