Science & Mathematics - 10 September 2007

i have a question on factoring how owuld you factor lets say these X(2x-1)+2(2x-1) and (x+3)^2-3(x+3) and 8x^4-31x^2-4 Im having trouble factoring those Help would be appreciated thank you!!

2007-09-10 14:35:05 · 2 answers · asked by crocop49 1 in Mathematics

2007-09-10 14:33:40 · 9 answers · asked by Anonymous in Astronomy & Space

My Professor told the class that we could earn extra credit on the test by finding out what the Chebyshev Theorem formula was and how to use it. I'm trying to get as many extra credit points as I can since you never know what's going to come up in the future.

2007-09-10 14:33:14 · 5 answers · asked by Anonymous in Mathematics

why is it essential that all measurements be accompanied by appropriate units?

2007-09-10 14:29:43 · 2 answers · asked by lippypout 3 in Physics

i am not good in science and i need help
please

2007-09-10 14:29:35 · 9 answers · asked by luvjb 1 in Weather

2007-09-10 14:29:00 · 10 answers · asked by Arlene B 1 in Mathematics

example : one thousand in standard form is 1000 but what's one billion?

2007-09-10 14:27:43 · 14 answers · asked by Windy-Cindy 1 in Mathematics

This is one of those questions where you have to figure out how much a person bought of each thing to have a certain final bill.


Wayne is building a shed in his backyard to store his snowmobile. "Value Hardware" sells 3-in finishing nails for $0.99/lb and 2-in finishing nails for $1.39/lb.

Wayne needs 5 lbs. of nails. If his bill totals $6.15, how many pounds of each size did he buy?


Please show me how to solve this problem and the other kinds like these!!! They are so frustrating!

2007-09-10 14:27:23 · 3 answers · asked by 2 days after my B day :) 2 in Mathematics

Photo:

http://s30.photobucket.com/albums/c329/benjyman/unknown%20plant/?action=view¤t=P9100149.jpg

2007-09-10 14:24:51 · 2 answers · asked by random pplzs 1 in Botany

2007-09-10 14:23:16 · 15 answers · asked by Anonymous in Earth Sciences & Geology

2007-09-10 14:23:00 · 15 answers · asked by Anonymous in Astronomy & Space

why do we have to use grenich mean time

2007-09-10 14:22:00 · 5 answers · asked by Anonymous in Earth Sciences & Geology

2007-09-10 14:21:09 · 13 answers · asked by Anonymous in Earth Sciences & Geology

Physics Question, please help if you can!! :)

2007-09-10 14:19:58 · 6 answers · asked by Anonymous in Engineering

2007-09-10 14:18:42 · 9 answers · asked by Anonymous in Biology

number of t-shirts and total cost
10 --------------------- 75
15 --------------------- 105
20 ----- --------------- 135

what is the cost of 1 t-shirt?

2007-09-10 14:18:03 · 4 answers · asked by daniella 2 in Mathematics

1. A diver running 1.7 m/s dives out horizontally from the edge of a vertical cliff and 3.0 s later reaches the water below.

How high was the cliff? ... m

How far from its base did the diver hit the water?.... m

2. A ball is thrown horizontally from the roof of a building 52 m tall and lands 45 m from the base. What was the ball's initial speed?

3. A batter hits a fly ball which leaves the bat 0.90 m above the ground at an angle of 57° with an initial speed of 29 m/s heading toward centerfield. Ignore air resistance.

(a) How far from home plate would the ball land if not caught?
(b) The ball is caught by the centerfielder who, starting at a distance of 105 m from home plate, runs straight toward home plate at a constant speed and makes the catch at ground level. Find his speed.

2007-09-10 14:16:06 · 1 answers · asked by Nikita 1 in Physics

2007-09-10 14:15:41 · 3 answers · asked by arcelie 1 in Biology

what are the principles of energy?
How do we control how we want it to transform? What steps do we need to follow? What do we need to know?
Can electromagnetic waves create propulsion? If so, how?
Can sound be used to push something forward? If so, how?

2007-09-10 14:14:57 · 5 answers · asked by Jonathan M 1 in Engineering

thanks a lot in advanced

2007-09-10 14:13:16 · 4 answers · asked by mfgrocker 2 in Mathematics

2007-09-10 14:12:38 · 17 answers · asked by wendy b 1 in Astronomy & Space

2007-09-10 14:08:47 · 7 answers · asked by Anonymous 2 in Mathematics

where can i find a eyepiece for a telescope((online)) with a Barrel diameter of 24.5 millimeters (0.965 inch). ?

i have been looking but the only good ones i can find are the 1.25" ones

and if you know where i can find them. im looking for one thats some where from 6mm - 9mm

2007-09-10 14:04:40 · 6 answers · asked by Anonymous in Astronomy & Space

Extremely bright green laser at 532 nm wavelength

Output power of <5mW (Class IIIa Laser Product)

What does all of this mean?
How do you know if you can see it in the air?

2007-09-10 14:04:34 · 3 answers · asked by Anonymous in Physics

i cant understand my math teacher and i have no idea how to solve for factorial division with 2 #s at the bottom. so can someone explain how you solve it step by step. an example would be 15!/3! 8!

2007-09-10 14:03:18 · 3 answers · asked by lol 1 in Mathematics

plz answer asap....

2007-09-10 14:01:55 · 11 answers · asked by Anonymous in Engineering

2007-09-10 14:01:20 · 5 answers · asked by ReyRey 1 in Weather

When multiplied and simplified, 2x(x + 1) equals?

I distributed to get (2x^2)+2x, does it simplify further?

2007-09-10 13:59:17 · 5 answers · asked by Bluefast 3 in Mathematics

2007-09-10 13:54:54 · 2 answers · asked by Anonymous in Earth Sciences & Geology

Every day, countless tons of silt are washed by rivers from the continents into the seas. Won't that make sea levels rise? Or is it all global warming's fault?

Keep in mind that nobody even knows for sure if global warming is caused by man, but it is a fact that man is not responsible for the process of continents losing landmass via erosion to the oceans.

2007-09-10 13:54:46 · 2 answers · asked by Bill W 【ツ】 6 in Earth Sciences & Geology