Question

1. 5m +9n
(if m= -7 and n= 4)

Answer 1

1

Explanation:

Given

5m + 9n ← substitute m = - 7 and n = 4 into the expression

= (5 × - 7) + (9 × 4)

= - 35 + 36

= 1

Answer 2

1

Explanation:

Evaluate 5 m + 9 n where m = -7 and n = 4:

5 m + 9 n = 9×4 - 7×5

5 (-7) = -35:

-35 + 9×4

9×4 = 36:

36 - 35

36 - 35 = 1:

Answer: 1