Question

When n = 3, which of the expressions below will be greater than 50? Select all that apply. A) (8n2÷9)⋅7 B) 2n2⋅3 –4n C) 4n2–6n+12 D) 7n+(n⋅8)

Answer 1

A

Explanation:

a)

`(8(3)^(2) / 9) * 7`

8(9) / 9 = 8 x 7 = 56

b)

`2(3)^(2) * 3 - 4(3)`

2(9) * 3 - 12

18 * 3 = 54 - 12 = 42

c)

`4(3)^(2) - 6(3) + 12`

4(9) - 18 + 12

36 - 18 = 18 + 12 = 30

d)

`7(3) + (3 * 8)`

21 + 24 = 45