Science & Mathematics - 29 October 2007

ok, i know there are many questions, a lot, and a lot of hipotesis and theories for each one of them, for example, darwin theory of monkeys or w/e, even so i dont trust the beggy of that one, is a good one, and it has sense, but really, what int the world can actually make them think that this world comes from some sort of meteor dust, there isnt any sense in saying that, theres no actual thing that can say where the heck did this world or humans came from, cuz even if darwin is right with the monkeys, where did they come from? i mean, there isnt any 50% theory on where what or how, but jesus christ, not space dust.

2007-10-29 14:51:43 · 9 answers · asked by jose r 3 in Earth Sciences & Geology

i cant solve this!
2x-y-z=7
3x+5y+z=-10
4x-3y+2z=4
if u can explain or just me an answer!! thank u!

2007-10-29 14:49:41 · 2 answers · asked by crazyyyCHICK 2 in Mathematics

An open box is to be constructed from a rectangular piece of cardboard which measures 18 inches by 20 inches. To make the box a square shaped cut is made at each corner of the rectangle and the sides folded up. Each square cut must be a whole number of inches on each side. Determine what size cut will result in the box with the greatest volume.

2007-10-29 14:49:11 · 1 answers · asked by Anonymous in Mathematics

At an unknown distance from its base the top of a tower subtends an angle B which measures 45.799 degrees. From a distance along a line through the tower base and the first observation point and 893 feet further away the top of the tower subtends an angle A which measures 31.700 degrees. To within five feet the tower is ____ feet high

2007-10-29 14:45:59 · 4 answers · asked by Anonymous in Mathematics

* all i really need to know is if plasma has more energy than gas*

2007-10-29 14:44:29 · 2 answers · asked by Erick H 1 in Physics

10x^2 - 30 x + 20 / x^2 - 1=

i'v tried it a million times but keep getting the wrong answers.

2007-10-29 14:44:12 · 8 answers · asked by salo 2 in Mathematics

2007-10-29 14:43:58 · 2 answers · asked by hemi_jack 1 in Chemistry

How do you do this type of problem?

Five singers are to perform at a talent show. One insists on being the last performer. If that is so, how many different ways are you able to schedule the appearances?

What is this? A permutation or combination? How do you solve it?

2007-10-29 14:41:12 · 2 answers · asked by yellowducks 1 in Mathematics

th sun, outer space

2007-10-29 14:37:50 · 2 answers · asked by Anonymous in Astronomy & Space

I did the quotient rule for both and obviously it didnt work... >.< please help

2007-10-29 14:36:57 · 1 answers · asked by Anonymous in Mathematics

solve for x:
(4x+6)/(5x+1)

solve for x:
(x-5)/(x+4)=(x-1)/(x+2)

2007-10-29 14:36:46 · 1 answers · asked by jason g 1 in Mathematics

A nonregular hexagon has five exterior angle measures of 55, 60, 69, 57, and 57. What is the measure of the interior angle adjacent to the sixth exterior angle?

2007-10-29 14:34:59 · 5 answers · asked by Anonymous in Mathematics

How do you do this type of problem?

Five singers are to perfrom at a tanelt show. One insists on being the last performer. If that is so, how many different ways are you able to schedule the appearances?

What is this? How do you solve it?

2007-10-29 14:34:10 · 1 answers · asked by yellowducks 1 in Mathematics

im doing a project and i need the answer to this question thanks. The clearer you explain the better.

2007-10-29 14:33:46 · 2 answers · asked by Anonymous in Physics

i need to calculate the mass of potassium hydrogen phthalate which must be dissolved in water to make 500ml of 0.2000M solution. plz help

2007-10-29 14:33:30 · 2 answers · asked by Anonymous in Chemistry

Let f be a twice-differentiable function such that f(2)=5 and F(5)=2. Let g be the function given by g(x)= f(f(x)).

Explain why there must be a value c for 2 f'(c)= -1

2007-10-29 14:33:08 · 1 answers · asked by sirsoccerhead 2 in Mathematics

The title says it all. Thanks for any help

2007-10-29 14:31:00 · 5 answers · asked by World Security 2 in Other - Science

2007-10-29 14:25:58 · 2 answers · asked by jose c 1 in Chemistry

What do cells store in lipids to use later? What are large organic molecules that contain intructions that cells need to function are called?

2007-10-29 14:22:28 · 1 answers · asked by Anonymous in Biology

2007-10-29 14:21:14 · 3 answers · asked by jose c 1 in Chemistry

2007-10-29 14:18:19 · 16 answers · asked by Brandon 1 in Mathematics

plz hlp u guys r my only hope. I have a test on this stuff tommorrow. Plz hlp me out man. I don't care who u r. i need someone with a kind heart to h;p me. U'll get karma points.

2007-10-29 14:17:56 · 3 answers · asked by Anonymous in Chemistry

2007-10-29 14:17:51 · 1 answers · asked by Yahoo 4 in Physics

How fast must a 146 g baseball travel in order to have a de Broglie wavelength that is equal to that of an x-ray photon with wve length = 100. pm?

2007-10-29 14:17:09 · 1 answers · asked by Anonymous in Chemistry

2007-10-29 14:16:58 · 2 answers · asked by Julian L 2 in Mathematics

Yeah - well, is there any difference between the brackets and the line when you're doing matrices? For example,

Is there any difference between:

[1 2 3]
[4 5 6]

and

|1 2 3|
|4 5 6|

That's all I need.

Thanks in advance!

2007-10-29 14:16:19 · 2 answers · asked by Anonymous in Mathematics

How would you go about doing this??

Thanks for any replies

2007-10-29 14:15:55 · 1 answers · asked by Dan 1 in Mathematics

2007-10-29 14:15:20 · 2 answers · asked by Anonymous in Mathematics

What is your last?

2007-10-29 14:13:13 · 3 answers · asked by TOQ 2 in Other - Science

Please explain how you got the answer.

2007-10-29 14:13:01 · 2 answers · asked by wendy f 3 in Mathematics