Science & Mathematics - 1 August 2007

1. x^2 - 16 is an example of a difference of two _______?

2. Solve by factoring: One of the solutions to the quadratic equation x^2 + 3x - 28 is x = -7. What is the other solution? (Type only the numerical value of the other solution. Do not use any variables or skip any spaces.) For the other solution, x = ?

2007-08-01 08:10:12 · 4 answers · asked by Anonymous in Mathematics

2007-08-01 08:07:35 · 1 answers · asked by Anonymous in Chemistry

a, a table is priced at £12 but during a sale, all prices are reduced by 20%. how much does the table cost now?

b, the height of a tree increases by 15%. if it was 3 meters high before, how high is it now?

how do i calculate theses? what are the stages?

2007-08-01 08:03:26 · 14 answers · asked by . 1 in Mathematics

Ψ(bar, sub 0) = √(m/π)*e^(-2α(xbarsubi)² + A)


please list all your steps you can find the problem on page 107 of stephen hawkings the universe in a nutshell (thanx daniel g for getting me the full equation btw)

2007-08-01 08:03:04 · 4 answers · asked by william65132005 1 in Physics

2007-08-01 08:02:28 · 38 answers · asked by Anonymous in Astronomy & Space

Every time i read about it there's always speculation that is was a hoax by the U.S. government to thwart Russia (Cold War era) from being the first country to send a human to the moon. What do you guys think?

2007-08-01 07:56:12 · 11 answers · asked by rayrayfrombk 1 in Astronomy & Space

Hey I was wondering, If i purachsed this kit with my new telescope what would it actually do?

Here's the kit
http://www.meade.com/accessories/premium/index.html

Thanks

2007-08-01 07:48:44 · 5 answers · asked by Anonymous in Astronomy & Space

1. Factor:
3y^2 - 4y - 20
Which of the following is one of the factors?

A. (3y - 10)
B. (y + 3)
C. (3y + 2)

2. What is the Greatest Common Factor for the given polynomial?
5x^3y^2 + 15xy^2 + 25x^2y^3

A. 5x
B. 5xy
C. 5xy^2
D. prime

3. Factor:
12x^2 - 21

A. (6x + 3)(2x + 7)
B. (12x + 7)(x + 3)
C. (3x + 7)(4x – 3)
D. 3(4x^2 - 7)

2007-08-01 07:48:42 · 5 answers · asked by Sunshine 1 in Mathematics

2007-08-01 07:47:35 · 8 answers · asked by peter g 1 in Physics

2x^2 + 7x-5=0

(If there is more than one solution, separate them with commas.)



I am absoutly clueless on how to do these types of questions, so any help will be greatly appreciated!

2007-08-01 07:46:09 · 2 answers · asked by Aimee R 1 in Mathematics

please show all work

2007-08-01 07:38:50 · 1 answers · asked by Anonymous in Mathematics

What is the distance between A(-1, 2, 3) and B(4, -5, 6), rounded to the nearest tenth?

2007-08-01 07:37:29 · 2 answers · asked by Anonymous in Mathematics

2007-08-01 07:35:51 · 6 answers · asked by electric 1 in Engineering

How many tablespoons is 4.5 oz or how many tablespoons is 100g? I am mixing sea salt for my hermit crabs.

2007-08-01 07:30:28 · 3 answers · asked by Serena 3 in Mathematics

2007-08-01 07:24:10 · 5 answers · asked by Anonymous in Astronomy & Space

If 25% of 100 is 75 then why cant i devide 100 by 1.25 and get the same number

2007-08-01 07:23:11 · 4 answers · asked by corys_fat 1 in Mathematics

will the plant be able to keep up? This may go a little beyond what heliotropism is capable of keeping up with, but that's what I'm trying to find out.

(I'll reset it every so often, so it is not trying to rotate in a complete circle.)

Will it give up in disgust and die? Will it harm the plant? Or strengthen it?

How might these conditions affect subsequent generations of sunflowers grown continuously under them? Assuming five or six generations of sunflowers per year, seed to next seed. What changes would you expect in the plants over the course of years?

I'm particularly wondering about the effects on the stalks. How tough are the stalks, anyway? Are they woody or pulpy? Could I break them by hand? Do they secrete anything that might provoke a severe allergic reaction, like poison ivy, o.s.l.t...?

You probably get the impression I don' t know much about plants, but that's why I'm asking! No wisecracks, plase. Thanks for all serious answers.

1 AUG 07, 1920 hrs, GM

2007-08-01 07:20:23 · 3 answers · asked by cdf-rom 7 in Botany

The cost of producing a number of items x is given by c=mx+b in which b is the fixed cost and m is the variable cost (the cost ofproducing one more item. If the fixed cost is $40 and the variable cost is $10, write the cost equation.

2007-08-01 07:17:09 · 3 answers · asked by Darban & LaJuana M 1 in Mathematics

a.) If , y=√x +2, fill in the following table for x = 0, 1, 2, 3, 4. Round to three decimal places where necessary.

b) Explain why no negative values are chosen as values to substitute in for x.

2007-08-01 07:02:53 · 3 answers · asked by Anonymous in Mathematics

How many 12-oz cans of apple juice would it take to give 60 people one 8-oz serving of apple juice each?

2007-08-01 06:58:46 · 7 answers · asked by Chase L 1 in Mathematics

A friend told me that flies vomit everytime they land, is this true?

2007-08-01 06:55:08 · 10 answers · asked by Chris 2 in Zoology

2007-08-01 06:50:38 · 12 answers · asked by Anonymous in Astronomy & Space

Mathematical symbols like the square root sign (instead of sqrt(x) or x^(1/2)), pi, etc.

2007-08-01 06:50:28 · 7 answers · asked by Aquaboy 6 in Mathematics

#6. (4x-2)/5=10
x5 x5(multiplication property)
4x-2=50
+2 +2( reflexive property of equality)
4x=52
1/4(4x)=1/4(51)multiplication property)
x=13 (multiplicative inverse)

#7.


-x/3 -5=2x
3(-x/3) -5=3(2x) (multiplication property)
-x-5=6x
+x +x (reflexive property of equality)
-5=7x
1/7(-5)= 1/7(7x)(multiplication property)
-.7=x (multiplicative inverse)

2007-08-01 06:49:38 · 3 answers · asked by Anonymous in Mathematics

2007-08-01 06:49:20 · 6 answers · asked by Anonymous in Mathematics

2007-08-01 06:47:30 · 10 answers · asked by Anonymous in Physics

1-(9z+2y) / (2z) + (9z - 4y) / (5z)

2007-08-01 06:46:56 · 5 answers · asked by Brandon 1 in Mathematics

2 of my friends and I decided to take a dip at 9:30 PM. I was expecting it to be freezing but it was actually warmer than it was when i went in during the day on Sunday.

My friend, using his logic, said it was because the sun heated it up during the day causing it to be warmer at night. I find that hard to believe.

Enlighten me please. :D

2007-08-01 06:43:32 · 4 answers · asked by The Boss Sound 3 in Weather

How do I take the intergral of (8x+11)/(x^2+9) dx?

2007-08-01 06:43:11 · 4 answers · asked by jennifer 1 in Mathematics

Also how important is mathematics to you, how has mathematics influced your life and what is the greatest joy you get from doing mathemactics? What has been your greastest mathematic acheivement?

2007-08-01 06:40:07 · 6 answers · asked by Anonymous in Mathematics