Answers to Review--both classes!!!

PRE-ALGEBRA REVIEW SHEET ANSWERS:

1.) m = -13
2.) x = 2
3.) x = 3/5
4.) x = -7
5.) infinite solutions
6.) no solution
7.) 3.5 hours of labor
NO IDEA WHERE 8 AND 9 ARE!?! SORRY!
10.) x = -9/8
11.) x = 260.2
12.) m = 12.5, so you would need to buy 13 magazines
13.) x = 3 , y = 12, short side = 9, long side = 28, perimeter: 74
14.) x = 40 inches, height = 42 inches
15.) Jenn = 54, daughter = 28
16.) 19 cm = length, 41 cm = width




ALGEBRA REVIEW ANSWERS:
SLOPE:
1.) m = 2, increasing
2.) m = undefined, vertical
3.) m = 2/7, increasing
4.) m = 0, horizontal
5.) m = 64/-9, decreasing
6.)m = 45/4, increasing
7.) m = -13/3, decreasing
8.) m = 1/2, increasing

GRAPHING USING INTERCEPTS:
1.) (0, 4) and (-2, 0) Then Graph
2.) (0, -3( and (6, 0) Then Graph
3.) a.) 6x + 3y = 30
b.) GRAPH! (5, 0) and (0,10)
c.) *YOU ONLY NEED THREE OF THESE*: (1, 8) (2, 6) (3, 4) (4, 2) (5, 0)
d.) x intercept is (5, 0) which represents the number of movies Emily can rent if she rents 0 video games.
e.) y intercept is (0, 10), which represents the number of video games Emily can rent if she rents 0 movies.

GRAPHING FUNCTION FORM:
1.) y = -3 should be a horizontal line at -3.
2.) function form: y - -1/4x + 4 then graph
3.) x = 2 should be a vertical line at 2.
4.) function form: 4 - x = y then graph.