Science & Mathematics - 29 November 2007

These two problems have to do with factoring polynomials by grouping...how do I do this? I need steps, not just the answer.

1. 10x^3 + 20x^2 + x +2
2. 2x^3 - x^2 + 2x -1

Thanks!

2007-11-29 02:31:24 · 6 answers · asked by musicalchik 4 in Mathematics

I need help with matlab. I keep getting "error matrix must be a square". It can get corrected when i change for example x^2 to x.^2. The program will work fine, but I am writing long program and I want that automatically done. How will I go about that?

2007-11-29 02:31:09 · 2 answers · asked by electric 3 in Engineering

If data collected of CO, plotting the data and fitting a curve to the resulting scatter plot yielded the function COs(x)=e^-2.465+0.028x, where x is the speed in miles per hour. The units for CO2(x) are grams per second (g/sec). Convert the CO to grams/mile, then determine the speed that minimizes the CO in terms of grams/mile.
grams/second(conversion factors)=(grams per mile)

If you can answer this in the next 30-40 minutes, I will bow to you. I need this solution for extra credit, and i spent 2 hours on it last night. Please Help, It would really be appreciated.

2007-11-29 02:28:00 · 5 answers · asked by Anonymous in Mathematics

2007-11-29 02:26:23 · 2 answers · asked by Anonymous in Zoology

A 820 N crate is being pulled across a level floor by a force F of 400 N at an angle of 33° above the horizontal. The coefficient of kinetic friction between the crate and the floor is 0.25. Find the magnitude of the acceleration of the crate.

2007-11-29 02:25:32 · 2 answers · asked by Anonymous in Mathematics

english paper

2007-11-29 02:23:36 · 11 answers · asked by jordan v 1 in Biology

2007-11-29 02:22:00 · 5 answers · asked by Anonymous in Zoology

2007-11-29 02:20:43 · 11 answers · asked by Anonymous in Physics

What mining method is the best


sources please

2007-11-29 02:18:33 · 3 answers · asked by whyus?? 3 in Earth Sciences & Geology

never read down

2007-11-29 02:18:20 · 9 answers · asked by sundeep 9732 1 in Astronomy & Space

if there are 20 factors, what is the formula to solve this?

2007-11-29 02:16:17 · 4 answers · asked by Divine C 2 in Mathematics

it turns the lamps on automatically when it is dark.. how does its mechanism work?

2007-11-29 02:14:03 · 5 answers · asked by Anonymous in Other - Science

similarly decimal numeral system is also "base-10" system. what is it? i need the answers urgently as i am doing a maths project.

2007-11-29 02:10:49 · 7 answers · asked by dhruvi 1 in Mathematics

the question is "name a property that the rational numbers have that whole numbers do not"

2007-11-29 02:09:48 · 11 answers · asked by Erin G 2 in Mathematics

and does it cause global warmin and skin cancer

2007-11-29 02:05:23 · 15 answers · asked by kevin f 3 in Weather

2007-11-29 02:04:00 · 3 answers · asked by shimo 1 in Zoology

2007-11-29 02:03:26 · 2 answers · asked by sundeep 9732 1 in Astronomy & Space

2007-11-29 02:02:39 · 20 answers · asked by pallavi t 1 in Astronomy & Space

2007-11-29 02:01:41 · 5 answers · asked by Anonymous in Mathematics

Sudden thought and am curious.... LOL

2007-11-29 01:59:13 · 17 answers · asked by Anonymous in Astronomy & Space

So the scientists say.But what is the clear evidence or is just a guess

2007-11-29 01:46:19 · 25 answers · asked by colin 2 in Astronomy & Space

2007-11-29 01:46:11 · 6 answers · asked by kishore s 1 in Zoology

This is something that is spoken in myths, fables and astrology.

However, in reality, do you think man can do it one day? If humans can do it, how do you think they will do it?

2007-11-29 01:43:23 · 11 answers · asked by Anonymous in Astronomy & Space

to keep the box moving across the floor at a constant velocity?

2007-11-29 01:41:46 · 2 answers · asked by lana l 1 in Physics

I TRIED SOLVING IT BUT I DONT KNOW IF AM RIGHT

Ca (OH) 2 (S) + HNO3 (aq)>>>>> 2H2O (l) + Ca (NO3)2 (aq)

Ca (OH) 2 (S)=-986.1 kj/mole
+
2HNO3 (aq) = -414.8 kj/mole
= -1400.9 kj/mole

2H2O (l)= 571.6 kj/mole
+
Ca (NO3)2 (aq) = -938.4 kj/mole
=-1510

-1510-(-1400.9)= -109.1




the mole for Ca(OH)2 (s)= .2985450115

and the moles for HNO3=2.1376

2007-11-29 01:41:44 · 1 answers · asked by io 1 in Chemistry

2007-11-29 01:39:30 · 0 answers · asked by om_chessking 2 in Physics

2007-11-29 01:39:04 · 3 answers · asked by william w 1 in Geography

2007-11-29 01:37:43 · 4 answers · asked by Anonymous in Mathematics

2007-11-29 01:37:14 · 8 answers · asked by Ghost of Rasputin 2 in Astronomy & Space

why? stem cells help people why wont the support stem cell research

2007-11-29 01:36:34 · 7 answers · asked by dear maria 1 in Medicine