i need help please!
By jamie08
@jamie08 (430)
United States
June 2, 2008 1:02pm CST
ok so i went to apply to go to college today and they said i have to take a test. Well i am sitting here looking at the math part and i dont remember how to do some of these!!! can some one please help me?
1. a3b4c6 / a2b3d =
______
a4b2
2. students need to paint one side of a wooden semicircular prop to be used as the sun on the set of a play. The diameter of the semicircle is 10 ft. and a can of paint covers 32 square feet. what is the minimum number of cans of paint the students must buy?
1 person likes this
1 response
@ycpgoldberg (807)
• Malaysia
2 Jun 08
I not quite remember the first question.
"a3b4c6/a2b3d
= _________
a4b2"
Is this?:
a3b4c6/a2b3d = ?/a4b2
or just:
a3b4c6/a2b3d = ?
a3b4c6/a2b3d = 12c/d
Second question:
Area of circle = pr^2 (Pi*Radius square)
Area of semicircle = 1/2 pr^2 (Half Pi*Radius square)
1/2 p (10ft)^2
= 1/2 * 22/7 * 100sq.ft
= 11/7 * 100sq.ft
= 157.143sq.ft (Rounded)
157.143sq.ft / 32sq.ft per can
=4.9 cans.
Therefore, it's required 5 cans.
@ycpgoldberg (807)
• Malaysia
3 Jun 08
a3b4c6 over a4b2/ a2b3d
a3b4c6 / (a4b2 / a2b3d) right?
a3b4c6 / (a4b2 / a2b3d)
=a3 b4 c6 * (a2 b3 d / a4 b2)
=a5 b7 c6 d / a4 b2
=a b5 c6 d
x2-x over x2+3x+2 divided by x2+2x over x2-1?
(x2-x / x2+3x+2) / (x2+2x / x2-1)
= (x2-x / x2+3x+2) * (x2-1 / x2+2x)
= (x4-x2-x3+x) / (x4+3x3+2x2+2x3+6x2+4x)
= x-x2-x3+x4 / 4x+8x2+5x3+x4
I got write it down and upload it to net.
Question 1: http://www.shareapic.net/content.php?id=9060942&owner=GoycP
Question 2: http://www.shareapic.net/content.php?id=9060949&owner=GoycP
