Puzzle: Practice

1.  -9z when z = 9
2. 4 and 7 = 3
3. -8 + 2g when g = -5
4. 1/4k + 30 when k = 20
5. 12(4 - x) when x = 1
6. q² + 15 when q = -6
7. -8m² when m = 4
8. 4d ÷ 3 – 20 when d = 12
9. (2b +1) ² when b = -2
10. -5(3a² – 24) when a = 3

 Puzzle Practice Answer Key:

1. -9z when z = 9
1. -9(9) = -81

2. 4 and 7 = 3
1. 4(7) – 3
2. 28 - 3 = 25

3. -8 + 2g when g = -5
1. -8 + 2(-5)
2. -8 +-10 = -18

4. 1/4k + 30 when k = 20

            1. ¼ (1 * 4) = 4 / (20) = 5

            2. 5 + 30 = 35

5. 12(4 - x) when x = 1
1. (4-1) = 3
2. 12(3) = 36

6. q² + 15 when q = -6
1. -6 * -6 = 36
2. 36 + 15 = 51

7. -8m² when m = 4
1. (4 * 4) = 16
2. -8(16) = -128

8. 4d ÷ 3 – 20 when d = 12
1. 4(12) / 3 – 20
2. 4(12) = 48
3. 48 ÷ 3 = 16
4. 16 – 20 = -4

9. (2b +1) ² when b = -2
1. 2(-2) = -4
2. -4 + 1 =-3
3. (-3 * -3) = 9

10. -5(3a² – 24) when a = 3
1. (3 * 3) = 9
2. 3(9) = 27
3. 27 – 24 = 3
4. -5(3) = -15