Question

Which expression has a value of 36? *
2 points
[(4 x 5) + (9 + 7)] + 9
[(4 x 5) + (9 + 7)] - 9
[(4 x 5) - (9 + 7)] x 9
[(4 x 5) - (9 + 7)] + 9

Answer 1

It is C: [(4 x 5) - (9 + 7)] x 9

Answer 2

Simplify the following:
9 x (4×5 x - (9 + 7))

9 + 7 = 16:
9 x (4×5 x - 16)

4×5 = 20:
9 x (20 x - 16)

Factor 4 out of 20 x - 16:
9×4 (5 x - 4) x

4×9 = 36:
Answer: 36 x (5 x - 4)     = [(4 x 5) - (9 + 7)] x 9