Which of the following gives all values of x that satisfy −4 ≤ 2x + 6

Question

Which of the following gives all values of x that satisfy −4 ≤ 2x + 6 < 10?

Accepted Answer

A. −5 ≤ x < 2. Subtract 6 to get −10 ≤ 2x < 4, then divide by 2.

Answer

B. −5 < x ≤ 2 — The strict and non-strict signs are swapped.

Answer

C. −2 ≤ x < 5 — This divides before subtracting 6.

Answer

D. 5 ≤ x < 8 — This adds 6 instead of subtracting.

Algebra practice question