Science & Mathematics - 18 August 2007

2007-08-18 08:12:05 · 7 answers · asked by juror#1 2 in Astronomy & Space

Question 20 (Multiple Choice Worth 4 points)

Factor the polynomial x2 + 6x – 27. Which one of the following is a factor?

(x – 9)

(x + 3)

(x + 9)

(x + 6)



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Question 21 (Multiple Choice Worth 4 points)

Factor the polynomial 15x – 3xy + 20 – 4y by grouping.

3(5x – 3y) + 4(5 – y)

(3x + 4)(5 – y)

(3x – 4)(5 + y)

Prime



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Question 22 (Multiple Choice Worth 4 points)

Solve the given equation by using the quadratic formula.

x2 – 5x – 3 = 0

What value is under the square root (or radical) in your answer? (Note: You are asked to identify only the value under the radical, not the solution to the equation.)

25

9

16

37



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Question 23 (Multiple Choice Worth 4 points)

Factor the polynomial ax + 2ay + bx + 2by by grouping.

(a + x)(b + 2y)

a(x + 2y) + b(x + 2y)

(a + b)(x + 2y)

Prime



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Question 24 (Essay Worth 4.0 points)

Use the following quadratic equation to complete parts a and b below. You must show all work.

x2 + 3x - 18 = 0

a. Solve by factoring.
b. Solve using the quadratic formula.

Question 25 (Multiple Choice Worth 4 points)

Factor the polynomial 12x2 + 11x – 5 completely.

(12x – 5)(x + 1)

(12x + 1)(x – 5)

(4x + 5)(3x – 1)

(4x – 1)(3x + 5)

2007-08-18 08:10:00 · 8 answers · asked by Anonymous in Mathematics

Verify that the following are identities:

(1+sinz)(1-sinz)= 1/sec^2 z <---that last part is one over secent squared z

2007-08-18 08:07:09 · 5 answers · asked by ksv 1 in Mathematics

2007-08-18 08:05:39 · 18 answers · asked by juror#1 2 in Astronomy & Space

2007-08-18 08:05:11 · 3 answers · asked by sasc42464 2 in Chemistry

2x^2 = (sqrt of 3x) -1/2
2x^2 = 3ix -1/2
2x^2 -3ix=-1/2
x(2x-3i)=1/2

and

4=8x^-2 +x^-4
4=x^-2(8+x^-2)

these two problems are giving me trouble and i dont know how to go on from there..like finding the roots,i appreciate any help thanks

2007-08-18 08:04:32 · 3 answers · asked by Anonymous in Mathematics

2007-08-18 08:00:53 · 24 answers · asked by karam 1 in Mathematics

It seems to be primarily nocturnal and resembles a garden spider. Approx. the size of a nickel. I live in NW Florida.

Image at http://elav8.net/spiderid.jpg

2007-08-18 07:59:25 · 4 answers · asked by jcla514 2 in Zoology

2007-08-18 07:54:56 · 3 answers · asked by quanna12 1 in Astronomy & Space

This is from an SAT subject test (Math 1) online prep. I can't figure it out for the life of me! Please don't just tell me the answer, but also how you're supposed to figure it out!

http://i223.photobucket.com/albums/dd205/OkayThanksToYou/maththing.jpg

Thanks so much!! I'll pick a best answer TONIGHT!

2007-08-18 07:51:38 · 5 answers · asked by Anonymous in Mathematics

Would it pass thru without shattering the glass? or would the glass break?

2007-08-18 07:50:51 · 10 answers · asked by ROCO 2 in Physics

2007-08-18 07:49:25 · 11 answers · asked by ra16297845 3 in Mathematics

2007-08-18 07:46:09 · 9 answers · asked by Anonymous in Zoology

is this crazy,nasa knows theres a problem u can bet your *** if theres another columbia hell will break loose .what is nasa thinking about ,bunch of bozos,i can only pray for a safe return.

2007-08-18 07:45:20 · 4 answers · asked by Anonymous in Astronomy & Space

2007-08-18 07:44:12 · 2 answers · asked by lackjc2004 1 in Physics

2007-08-18 07:43:38 · 2 answers · asked by Santo T 1 in Engineering

Large 5 pointed star 3 dimentional hung in the front of a persons house

2007-08-18 07:41:22 · 8 answers · asked by Sandman1959 1 in Astronomy & Space

2007-08-18 07:38:51 · 4 answers · asked by kerby y 1 in Zoology

the f and c are degrees of farhenheit and celsius, i really hav no idea wat to do, thanx for da help!

2007-08-18 07:37:51 · 4 answers · asked by Anonymous in Mathematics

a bage contains 4 white marbles, 5 blue marbles, and 3 yellow marbles. what is the least number of marbles a blidfolded person should withdraw from the box so as to be sure that she has 3 of the same color?

2007-08-18 07:37:29 · 4 answers · asked by Anonymous in Mathematics

2007-08-18 07:35:55 · 1 answers · asked by Mike 3 in Medicine

3-d is length, width and height. So wats 4-d?

2007-08-18 07:35:13 · 9 answers · asked by Anonymous in Astronomy & Space

2007-08-18 07:31:24 · 8 answers · asked by laurenw 2 in Mathematics

I have school starting on monday and we received a packet for summer studying if we felt neccessary. Only problem is, I forgot a lot of the stuff I learned in Geometry and Algebra 2. Here are some sample problems I need to learn how to do...

Solve the following for x:

1.) -17/8x - 4/3 = 1

2.) 51/2x - 23/3x = 6



Solve each system of equations for x and y:

1.) { 4x-3y = -6
{ x+2y = -7

2.) { 19=5x+2y
{ 1=3x-4y


Compute the products:

1.) (3x² - 2a²)²

2.) [(a+b)-4] [(a+b)+4]


Factor the following:

1.) ab-bc+a²-ac

2.) 3x² - 22x - 16



Those are just some random problems I'm having trouble with.

This is not homework, it is only a summer study packet that should get me ready for class on monday.

Thanks for your help.

2007-08-18 07:30:34 · 3 answers · asked by Anonymous in Mathematics

I seen so many photographs that appear to show the entire galaxy but it seems to me to be impossible to get a camera that far away. forgive me, I have never taken any astronomy classes so I am sure this is a stupid question

2007-08-18 07:28:54 · 10 answers · asked by Anonymous in Astronomy & Space

Here is my dilemma...

I was trying to use ammonia as an eco friendly refrigerant. Turns out it has a lot of issues.

1- It's corrosive to all metals with the exception of stainless steel. Fine! I'll use expensive stainless steel pipes.

2- It's used in the manufacturing of explosives! Crap! I can't use it. The Egyptian government is doing its best to prevent terrorists from getting what they need to manufacture explosives. So, they prevent average Alfred Q. Publics, like myself, from getting it.

Ammonia gas is highly soluble in water. It can also be absorbed by calcium chloride. It has a very low boiling point -33 Celcius. It is extremely corrosive. It is used in explosives.

Does anything exist that is either soluble in water or absorbed by some kind of salt and has a very low boiling point?

I'd prefer nothing corrosive.

But I sure DON'T want anything that can be used in explosives. Not even theoretically. :o)

Thanks a lot.

2007-08-18 07:28:22 · 2 answers · asked by Abdallah A 3 in Chemistry

put in slope/y-intercept form identify the slope and the y-intercept

y=6

2x-1/2=y

y=5-x/5

y=2x/6-1/3

y=4x/-5

x+y=6

2x-y=0

3x+2y=6

y-x=-1

3x-y=1

x+3y=10

5x-2y+3=0

7x+3y=21

3x+9=0

3y-6=0

2007-08-18 07:26:32 · 4 answers · asked by Haley's comet 1 in Mathematics

thats my answer to my proffessor when he got all wise *** to us.

2007-08-18 07:26:01 · 2 answers · asked by eagle 2 in Astronomy & Space

the sky is not actually blue it is just a reflection of the sun's light on the universe or blanket of sky. this is just my theory

2007-08-18 07:22:33 · 7 answers · asked by eagle 2 in Astronomy & Space

2007-08-18 07:21:00 · 8 answers · asked by prkns_mgn 1 in Weather