Science & Mathematics - 27 July 2007

Perform the indicated operation. Simplify if possible.

4x / x^2 - 8x + 15 - 12 / 8^2 - 8x + 15

4 / x - 5

4(x + 3) /( x - 3) ( x - 5 )

4 ( x - 3 ) / (x + 3 ) ( x - 5 )

4 / x - 3

2007-07-27 10:14:00 · 3 answers · asked by Anonymous in Mathematics

2007-07-27 10:09:31 · 6 answers · asked by morne 1 1 in Other - Science

2007-07-27 10:08:48 · 10 answers · asked by ballineagles 1 in Physics

say there was like huge 30 foot red clock and in the middle of the night, one person stands 20 feet away, and the other goes 60 miles away (in the desert), gets a pair of binoculars and looks at the red letters of the clock...They are talking on a cell phone....will they both see different times? since it'll take the light a longer time to take to see?

2007-07-27 10:08:05 · 5 answers · asked by erwafredsfdsfsdf 5 in Physics

2007-07-27 10:01:37 · 8 answers · asked by Anonymous in Zoology

1. suppose y varies directly as x and y = 27 when x=3.
find x when y = 45.
2. suppose y varies inversely as x and y=24 when x= 3.
find x when y = 36
*write the point-slope form of an equation for the
line passing through the point at (3,-6) with slope
-4/3
3. write an equation in slope-intercept for the line
through point (2,4)and (6,-2)
4. determine the slope and y-intercept of the graph of
12+3y=-2x
5.evaluate xy/-4 if x=-2 and y=12

2007-07-27 09:56:59 · 8 answers · asked by austin 1 in Mathematics

My question is how did it regroup?

2007-07-27 09:55:51 · 5 answers · asked by Calvin & Hobbes 4 in Physics

2007-07-27 09:54:26 · 10 answers · asked by Anonymous in Mathematics

Factor by grouping: 8x^3 - 12x^2 + 6x - 9.

2007-07-27 09:52:27 · 4 answers · asked by Anonymous in Mathematics

please can anyone write a detailed description of a sodium bicarbonate tablet added to a glass of water?

2007-07-27 09:50:49 · 3 answers · asked by princess 2 in Chemistry

big bang is explosion of matter to form univers
at certain time .so when matter and how is formed

2007-07-27 09:49:43 · 14 answers · asked by assaad l 1 in Astronomy & Space

2007-07-27 09:48:51 · 10 answers · asked by lavelle9172000 1 in Mathematics

2007-07-27 09:47:29 · 2 answers · asked by Anonymous in Mathematics

it has to do with the binomial theorem.. please help..

2007-07-27 09:45:04 · 3 answers · asked by Anonymous in Mathematics

Thanks to everyone who is keeping up with the challenges! And thanks to the one guy who keeps following every move I do!! (you know who you are, stalker meany!)


Evaluate
x to the second power
y to the second power

when:
x=3
y = 2/3

2007-07-27 09:42:12 · 3 answers · asked by L. ♥. V. E. 2 in Mathematics

2007-07-27 09:41:15 · 4 answers · asked by pannme 1 in Biology

1. Factor completely: 16x^4 - 81

A. (2x - 3)^2(4x^2 + 9)

B. (4x^2 + 9)(4x^2 - 9)

C. (2x + 3)(2x + 3)(4x^2 - 9)

D. (2x + 3)(2x - 3)(4x^2 + 9)






2. Factor by grouping: 8x^3 - 12x^2 + 6x - 9.


3. Factor completely - 49 + x^2.

A. ( -7 + x)( -7 - x)

B. ( -7 + x)(7 + x)

C. (x - 7)(x - 7)

D. prime


4. Factor completely 5x^3 - 5x^2 - x + 1.

A. 5x^2(x - 1) - 1(x - 1)

B. 5x^2(x - 1)^2

C. (x - 1)(5x^2- 1)

D. prime


5. Factor completely 4x^2 + 9.

A. (2x + 3)(2x + 3)

B. (2x - 3)(2x - 3)

C. (2x + 3)(2x - 3)

D. prime

2007-07-27 09:38:29 · 3 answers · asked by Anonymous in Mathematics

Any movement, corporation or set of corporations (conglomerate) with a single prominent leader that proposes a significant new knowledge, say with an inspiration from some traditional culture, is necessarily a cult. The leader is necessarily a pseudo scientific guru. Any attempt to connect their knowledge to some well known scientific theory is necessarily pseudoscience.

By new knowledge, I mean a structured knowledge with components that are provided with the intention to support each other. Also, the existence of a prominent leader is important. Organizations such as Yahoo inc. or Google inc. would not fit at all the above criteria.

I just asked almost the same question in General - Science & Mathematics. I hope it is not a duplication. I think that physicists are the most concerned.

Can you provide any possible exception to this criteria, even in principle? The idea is that, if no exception is provided, even in principle, then it is the criteria used by people.

2007-07-27 09:35:37 · 5 answers · asked by My account has been compromised 2 in Physics

2007-07-27 09:27:13 · 11 answers · asked by Anonymous in Astronomy & Space

2007-07-27 09:26:09 · 13 answers · asked by Anonymous in Mathematics

2007-07-27 09:24:51 · 15 answers · asked by Anonymous in Astronomy & Space

2007-07-27 09:22:16 · 4 answers · asked by Tyleeka J 1 in Geography

Solve

-3y = -9/10

2007-07-27 09:16:59 · 9 answers · asked by L. ♥. V. E. 2 in Mathematics

Ok i live in a aera that is very rocky so i wont to know how long would it for a rock to get to the size of potota or a base ball>

2007-07-27 09:15:28 · 3 answers · asked by vivian s 1 in Earth Sciences & Geology

2007-07-27 09:15:03 · 7 answers · asked by Anonymous in Mathematics

2007-07-27 09:12:33 · 4 answers · asked by Anonymous in Mathematics

A partifcle of mass 34g and charge 19 uC is released from rest when it is 70 cm from a second particls of charge -19 uC. Determine the magnitude of the initial acceleration of the 34g particle. Answer in units of m/s^2.

2007-07-27 09:07:04 · 2 answers · asked by jay b 1 in Physics

Hey, I'm struggling on a couple of physics questions regarding radioactive decay, if you could help me out that'd be great

1. The radioactive isotope 198Au has a half-life of 64.8 hr. A sample containing this isotope has an initial activity (t = 0) of 40.0 µCi. Calculate the number of nuclei that decay in the time interval between t1 = 10.0 hr and t2 = 12.0 hr.

2. In a piece of rock from the Moon, the 87Rb content is assayed to be 1.81×1010 atoms per gram of material, and the 87Sr content is found to be 1.06×109 atoms per gram. Calculate the age (in years) of the rock. Do not enter unit. 87Rb decays to 87Sr by beta decay with a half life of 4.75×1010 years.

Any help would be much appreciated.

Thanks

2007-07-27 09:03:50 · 2 answers · asked by rolo_cakes 2 in Physics

perform the indicated operation and simplify your answer.

((3p^3x)/(-6y^3)) / ((15p^9)/(-6y^5))

2007-07-27 09:03:07 · 2 answers · asked by It's just me 1 in Mathematics

1. Simplify:
(x+2) over (x) over (x-2) over (3x)

2. Simplify:
(1) + (1 over 4) over (3) - (1 over 2)

2007-07-27 09:02:49 · 4 answers · asked by casper5 3 in Mathematics