Question

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Answer 1

-12*-2 +2*-1 = 22
10+ (-4)-(-6) = 12
-8(-7-3) = 80
3-9+2(-9+4) = -16
12-{15+(-3)} / 6-8 = -9
15- 5{-(-5)} = 15

Answer 2

Answer:

1) 22

2)12

3)-80

4)-16

5)-10.5

6)-10

Step-by-step explanation:

-12x + 2y when x = -2 and y = -1

= -12 (-2) + 2 (-1)

= 24 + (-2)

= 22

10 + a - b when a = -4 and b = -6

= 10 + (-4) - (-6)

= 10 - 4 + 6

= 10 + 2

= 12

8(n-3) when n = -7

= 8 (- 7 - 3)

= - 56 - 24

= - 80

3 - x + 2(-x + 4) when x = 9

= 3 - 9 + 2 (- 9 + 4)

= - 6 - 18 + 8

= - 24 + 8

= - 16

12 - (15 + y) / 6 - 8 when y = -3

= 12 - 15 + 3 / 6 - 8

= 12 - 15 + 0.5 - 8

= - 3 - 7.5

= - 10.5

15 - a(-b) when a = 5 and b = -5

= 15 - 5 (5)

= 15 - 25

= - 10