Science & Mathematics - 19 July 2007

1. (2x-1)^2


2. Which of the following is a factor of 4-(x+y)^2?

2007-07-19 15:56:01 · 4 answers · asked by Rox 1 in Mathematics

I'm probably making this harder than it actually is, but I'm not sure.

(6.98cm - 2.83cm) X 1.7 sq. cm

Do I just multiply 4.15 cm by 1.7 sq. cm or do I need to convert 4.15 to sq. cm first?

(Oberserving significant digits, would it be 7.1 sq. cm?)

Thanks for your help!

2007-07-19 15:55:48 · 4 answers · asked by Steven M 3 in Chemistry

I want to know what 45g of cereal (special k to be exact) is in cups or ml.

2007-07-19 15:54:40 · 7 answers · asked by Hollie721 1 in Mathematics

there are 69 more patrons in cinema III than in cinema IV, how many patrons are there in cinema III ?

2) The average mass of Ravi, Sanur & Tarman is 37 kg. Ravi & Sanur together have an average mass of 34kg while Sanur & Tarman together have an average mass of 35kg. What is the average mass of Ravi & Tarman ?

2007-07-19 15:47:37 · 6 answers · asked by Lim S 3 in Mathematics

Thanks for all your help.

Factor Each Expression.

1. x2 + 5x – 14
2. x2 + 7x + 12
3. 3x2 – 10x + 8
4. 4x2 +20x + 25
5. 3x2 + 7x – 6
6. 25m2 - 4
7. 7x2 + 19x + 10

______________________________

Solve Each equation by factoring

8. (x + 13)(x + 1) = 0
9. x2 + 10x = - 21
10. x2 + 44 = 15x
11. 4x2 – 4x –15 = 0
_______________________________

Word Problems

Word problems ( 5 points each)
12. Suppose you are building a box of volume 32 in.3. The aquarium will be 1 ft. high. The base will be
a rectangle with the length 4 ft more than the width. Find the dimensions of the base.
Length: Width:

13. A rectangular poster has an area of 30 in.2. The length of the poster is 7 in. more than twice its
width. Find the dimensions of the poster.

Length: Width:

Bonus: Solve the equation by factoring. Show all work for credit. Box your answer. ( 5 points)
24r2 – 66r – 18 = 0

This is Straight off a test I need the awnser key to review with.

2007-07-19 15:44:07 · 2 answers · asked by Allen 1 in Mathematics

3x^2 + x - 1 = 0

Explain which method (or methods) may not be applicable at all times and why. Is the solution a set of real numbers, imaginary numbers, or complex numbers?

2007-07-19 15:37:48 · 2 answers · asked by Arthur M 1 in Mathematics

on the periodic table

2007-07-19 15:34:10 · 2 answers · asked by Tianna 1 in Chemistry

I mean if you think about it, things happen all the time that shouldnt have happened that alter virtually everything.However maybe those things that shouldnt have happend were supposed to happen.

2007-07-19 15:31:29 · 14 answers · asked by brewer37 1 in Physics

What is the speed of gravity?

Is there an physics equation?

2007-07-19 15:27:54 · 11 answers · asked by Anonymous in Physics

Should we be concerned about deforestation issues? Why? Why not?

2007-07-19 15:20:42 · 1 answers · asked by Anonymous in Earth Sciences & Geology

change x^4 - xy - 2y^4 = 3y from polar to cartesian (rectangular)

I tried working it out but it doesn't look right. Am I suppose to solve for r? or can you leave it as something else? I am a little confused.

I got
(rcos(θ) )^4/rsin(θ) - r cos(θ) - 2(rsin(θ))^3 = 3
I don't know what to do after that.

Help would be appreciated. Thanks

2007-07-19 15:20:28 · 3 answers · asked by Mark 2 in Mathematics

On farms, you will see cows. The males are called bulls. But many people generally call the species "cow".

Now, we approach a problem. Many species go by the cow/bull labeling. This includes whales, elephants, seals, moose, and, um... cows?

Here's my question. What is the proper name for the animal that you see on the farms and that you get beef from? Isn't it weird that we call them cows when, really, a cow is just a name for the female form of this species?

P.S. Don't take this question too seriously, because I'm not. I'm just a curious person.

2007-07-19 15:19:55 · 8 answers · asked by cve5190 4 in Zoology

A cyclist traveled at a rate of 24 mph to visit a nearby town. The cyclist averaged 18 mph on the return trip. If the round trip took 4.9 hours, find the distance to the nearby town. [Ten points for the correct algebra equation and five points for solving the equation.

2007-07-19 15:19:06 · 5 answers · asked by bikerbabechic13 1 in Mathematics

Ion drives are a form of this isn't it.

I'd think you'd start out slow but have the potential of going very fast over time.

2007-07-19 15:18:19 · 13 answers · asked by Sean 7 in Astronomy & Space

Determine the number of ways of selecting four letters from the word parallelogram, without disregard for the order. The answer is 150

Thanks

2007-07-19 15:18:03 · 2 answers · asked by Icobes 2 in Mathematics

No wiki or dictionary please. I just want a simple (5th grade) explanation of these two concepts and how they are used as a method in science.

Explain the general process of both, and how they basically differ.

2007-07-19 15:17:24 · 2 answers · asked by Rick 4 in Other - Science

What is and/or where is the fourth dimension?

2007-07-19 15:15:54 · 15 answers · asked by Anonymous in Astronomy & Space

I keep reading conflicting timelines for human evolution vs. dinosaur extinction. Can someone please explain.

2007-07-19 15:13:25 · 12 answers · asked by Anonymous in Biology

Einstein had several different theories about this didn't he?

2007-07-19 15:13:03 · 13 answers · asked by Sean 7 in Astronomy & Space

Does the UNIVERSE have a boundary or OUTER LIMIT?

What would you expect to see if you were to reach this boundary?

2007-07-19 15:11:42 · 7 answers · asked by Anonymous in Astronomy & Space

Why living organisms sex without the God who give this feelings ?

2007-07-19 15:08:02 · 15 answers · asked by Marlou G 1 in Biology

2007-07-19 15:05:13 · 5 answers · asked by ginatay00 1 in Biology

I am doing oil skimmer as my last year project. And for that I want a material that ahers (without reacting) with oil whose tubes will be available in market

2007-07-19 15:00:27 · 2 answers · asked by chitale_andy 1 in Engineering

2007-07-19 14:59:06 · 4 answers · asked by dgizrobin 2 in Zoology

If a spaceship is travelling through space approaching light speed or even greater - how to keep from hitting a wandering asteroid, meteor, comet or other object?

2007-07-19 14:58:44 · 13 answers · asked by devotionalservice 4 in Astronomy & Space

2007-07-19 14:57:27 · 4 answers · asked by Madelin U 1 in Physics

If it does, how will it rip us?

2007-07-19 14:54:40 · 10 answers · asked by Kevin. 2 in Astronomy & Space

First right answer wins.........

2007-07-19 14:53:05 · 12 answers · asked by Duke 2 in Biology

2007-07-19 14:48:40 · 2 answers · asked by Anonymous in Chemistry

DONT COMPLAIN JUST ANSWER


2. Use only the numbers 2,3,6,11, 15 in number sentences that equal 3,7,1,6, 2. Use any operations.

3.In the 6th, 7th,8th,9th games of the season, a player scored 23,14,11, 20 pts respectfully. Her points per game average was highrer after 9 games than her 1st 5 games. If her average after 10 games was greater than 18, what is the least number of points, she could have scored in the tenth game?

2007-07-19 14:46:14 · 5 answers · asked by Anonymous in Mathematics