Question

Which set of numbers is in the solution set for this inequality? 3x > 15

A) {3, 4, 5, 6}
B) {4, 5, 6, 7}
C) {5, 6, 7, 8}
D) {6, 7, 8, 9}

Answer 1

D) {6, 7, 8, 9}

Explanation:

3x > 15

x > 15/3

x > 5

Note that 5 is not included

So, the solution set must only include integers 6 onwards

Answer 2

D) {6, 7, 8, 9}

Explanation:

3x > 15

Divide each side by 3

3x/3 > 15/3

x > 5

The solution must be greater than 5