Question

Solve the open sentence.

–2 ≤ n + 4 ≤ 7

A.
n ≥ 6 and n ≤ –4

B.
n ≤ 2 and n ≤ 7

C.
n ≤ –6 and n ≤ 4

D.
n ≥ –6 and n ≤ 3

Answer 1

-2 <= n + 4 <= 7 --- subtract 4
-2 - 4 <= n + 4 - 4 <= 7 - 4
-6 <= n <= 3 which is the same as D

Answer 2

any questions ?