Science & Mathematics - 21 August 2007

Real Numbers???

1.) Can someone help me Evaluate the following expression?
[-27+14]

2.) Also, is this TRUE of FALSE?
[-8] + [3] = [-8+3]

2007-08-21 11:06:53 · 2 answers · asked by Anonymous in Mathematics

ok so ive been doing this problem forever, can i get some help, i need to SIMPLIFY

x^2-2x-35/2x^3-3x^2 X 4x^3-9x/7x-49

2007-08-21 11:03:08 · 4 answers · asked by johnalds_1990 2 in Mathematics

It is not a dandelion seed, for this 'pod' has no stem. For the life of me I have no idea what it is called or from what plant it comes from. I live in Canada, so its origin must be from North america. Help!!

2007-08-21 10:58:44 · 2 answers · asked by cerebraldude 1 in Botany

2007-08-21 10:51:42 · 11 answers · asked by Anonymous in Mathematics

this is about sunburn

2007-08-21 10:50:27 · 13 answers · asked by Y 1 in Astronomy & Space

5(n)=1
What property is this?

2007-08-21 10:49:29 · 3 answers · asked by animal_luver313 1 in Mathematics

Cause of the moons.

When moon blocked sun, we get eclipse.

So do people on Saturn ever seen the Sun everyday?

2007-08-21 10:44:07 · 10 answers · asked by Jagger Otto 7 in Astronomy & Space

2007-08-21 10:43:51 · 3 answers · asked by rydo311 1 in Engineering

Christina has three substances. each substance is a cube with a volume of 6 milliliters she is going to place all three substances in a tub of water and wants to know which will float. substance A has a mall of 4 grams substance b has a mall of 8 grams and substance C has a mall of 10 grams .
which substance will float?
explain?

please help with my homework question i just dont get it i thought that the lightest thing would float but look at a safty pin and an apple the safty pin sinks and the apple floats.

2007-08-21 10:43:02 · 3 answers · asked by Anonymous in Chemistry

If nothing is really eternal, and matter was created, then how can the law of conservation of matter hold? I mean, I've heard it was created AFTER the big bang, which confuses me even more. What was before the first big bang? I am a Lutheran Christian, and I am dogmatic too. But I am always curious as to what the latest theory is. The modified, 'multiple big bang' theory intrigued me, but I never got a solid answer for the matter thing. Thanks.

2007-08-21 10:42:47 · 4 answers · asked by thepbass 2 in Physics

please answers now u win $100 dollars

2007-08-21 10:40:57 · 9 answers · asked by KEVIN 1 in Zoology

2007-08-21 10:37:15 · 1 answers · asked by ? 3 in Physics

explain plz?

2007-08-21 10:36:36 · 4 answers · asked by candy 3 in Engineering

Sorry. I know I recently posted a question and believe me I am def. not trying to not do this homework assignment, its over 35 questions long and some of them are REALLY long (not just fill in the blanks) ..so I still have pleanty to do on my own.

If you want to dilute an acid, never add water to it, instead add
______ to _______-

2007-08-21 10:32:56 · 7 answers · asked by Anonymous in Chemistry

I've done the actual problem on my own, but I'm not sure how to put the answer. It needs to be in "general form"
The answer is 2y=3x+11.
In general form, would it be -3x+2y=11? or do I have it completely wrong and general form is something different? thanks.

2007-08-21 10:32:55 · 4 answers · asked by je t'♥ 5 in Mathematics

I have come across a math problem that I can't solve. The equation is: y/4z = x/w (Solve for: z)

2007-08-21 10:32:29 · 4 answers · asked by Anonymous in Chemistry

How do i write these in expanded form using the powers of ten .

1.) 2,700
2.) 42.063
3.) 5,782,000
4.) 5627
5.) 6,023.0047

2007-08-21 10:29:43 · 3 answers · asked by Anonymous in Mathematics

A diagram would be helpful. Any related information on protamine sulfate and its impurities and associated LC assay/impurity methods would be excellent.

2007-08-21 10:26:24 · 4 answers · asked by nascareer 1 in Chemistry

whats the probability that 4 maths student,drawn at random will be male?

2007-08-21 10:24:43 · 6 answers · asked by Anonymous in Mathematics

Hey ok here we go!U get 10 points if ur the first to get it right.

Dierections:Write in expanded form to the power of ten for ONLY SOME OF THEM!For the rest just write the answer to them and explain how u got the answer!

1)500 in expanded form to the power of ten.
2)54% of 100
3)33% of 100
4)345 in expanded form to the power of ten.
5)2666 in expanded form to the power of ten.
6)504 in exanded form to the power of ten.

WELL GOOD LUCK TO ALL REMEMBER 10 POINTS TO THE FIRST 2 GET IT RIGHT!!!

2007-08-21 10:22:29 · 2 answers · asked by Anonymous in Mathematics

please tell me why the letter "m" is used to represent slope

2007-08-21 10:22:14 · 1 answers · asked by milan 1 in Mathematics

2007-08-21 10:21:12 · 7 answers · asked by daniel.baires 1 in Astronomy & Space

Acid is similar to hot grease because when adding water to it the molecules heat up so rapidly (causing the molecules to seperate from each other at such a fast rate) an "e___" might result.

2007-08-21 10:19:30 · 7 answers · asked by Anonymous in Chemistry

how do hitting a golf ball in the moon differ from hitting a golf ball on the earth?

2007-08-21 10:18:24 · 13 answers · asked by Dan 2 in Physics

2007-08-21 10:17:38 · 4 answers · asked by Truly Amazing 2 in Chemistry

i have always wanted to know...

2007-08-21 10:16:55 · 4 answers · asked by Anonymous in Astronomy & Space

Seriously. I need to know.
Any ideas?

2007-08-21 10:14:43 · 7 answers · asked by Anonymous in Chemistry

My sister mixed soap together in my swimming pool. is the water still good? anything that can go wrong?

2007-08-21 10:13:53 · 2 answers · asked by levis 1 in Chemistry

with the ground. what is the x component of the force he exerts?

2007-08-21 10:13:38 · 2 answers · asked by Anonymous in Physics

Title.

2007-08-21 10:11:37 · 6 answers · asked by GoldRenamon 2 in Mathematics