1.    6 ≤ 12   &   9 ≥ 9        2.    a.   6    b.   3       3.   a. T    b. T

                                                   c. .5      d.   1.9         c. T    d. F

                                                   e. 5.18

4.    1             5.    GCF    8         6.            7.   

                              LCM   672

8.               9.    -18           10.    18

11.    10x²  -  15x  -  6     12.    29       13.    y = -5    14.    z =

15.    No Solution        16.    b =         17.    27,  28,  29,  30

18.    Length    20

          Width       6

19.    {x|x < 2}  or  (- ∞, 2)

The graph is an open circle on 2 and an arrow to the left.

20.    {y|y ≤ -1}  or  (-∞.-1]

The graph is a closed circle on -1 and an arrow to the left.

21.    {x|-4 ≤ x < }   or   [-4, )

The graph is a closed circle on -4 and an open circle on , with the

line  shaded between them.

22. a.   Start at the origin (0, 0), move 4 units to the left and two units

down. Plot that point. It should be in quadrant III.

       b.    Start at the origin (0, 0), move three units to the right and one unit

down. Plot that point. It should be in quadrant IV.

23.    a.    quadrant II

         b.    quadrant III

24.    rise    -4       25.    rise    -2

          run   -4                 run     6