Homework Wednesday, 2/6

Pre-Algebra: Practice Test.  You must do at least 3 sections, or you can do several problems from each section.  Or more.  Answers below.  Test tomorrow.

Algebra: Pg. 182 #21 - 25 and pg. 186 #29 - 36.  Special Instructions: the problems as they are written only ask you to factor the trinomials.  What you need to do is change them so that they all become equations and set them equal to zero, then solve for x.
For example, if the problem asks you to factor the expression x^2 - 6x + 5, then you need to change it to the equation x^2 - 6x + 5 = 0, and then solve for x.

Pre-Algebra Practice Test Answers:

Section I

1) 2d / 3
2) 3 / a or 3 / (1a)
3) (27x) / 14
4) 28 / (15p)
5) (45x^2) / 16
6) (2c^4) / 15
7) (4g^4) / 21
8) (153m) / 20

Section II

9) a = -4 / 9
10) b = -34 / 15 or -2 & 4 / 15
11) w = -5/8
12) x = 20 / 63
13) y = 10 / 3 or 3 & 1 / 3
14) z = 12 / 5 or 2 & 2 / 5

Section III (make sure your inequality signs are correct)
15) h < -16 / 5 or h < -3 & 1 / 5
16) i > -20 / 13 or i > -1 & 7 / 13
17) j < 6
18) k > 25 / 3 or k > 8 & 1 / 3

Section IV (make sure you know how to set up the necessary equations)
19) 21 mysteries
20) $27.50 per shirt
21) 5.5 hours
22) It will last 41 full days (including the nights)
23) 14 pies

Section V

24) 0.81818181... (both the 8 and the 1 repeat)
25) 1.625
26) 6.32
27) 0.0333333... (after the decimal point, a zero followed by a repeating 3)
28) 139 / 50 or 2 & 39 / 50
29) 2 / 25
30) 1032 / 125 or 8 & 32 /125
31) 83 / 50 or 1 & 33 / 50