Question

1.5 solve and graph
name:
date:
what point makes the inequality true? (circle the true point. show your work. no work, no credit!!!)
strategy: substitute (replace the x with each value, to see which one is true). you may use calculator.

1. 3x - 2 ≤ 20

options:
10 8 7 9

Explanation:

Step1: Substitute x = 10

$3\times10 - 2=30 - 2 = 28$, and $28
leq20$.

Step2: Substitute x = 8

$3\times8 - 2=24 - 2 = 22$, and $22
leq20$.

Step3: Substitute x = 7

$3\times7 - 2=21 - 2 = 19$, and $19\leq20$.

Step4: Substitute x = 9

$3\times9 - 2=27 - 2 = 25$, and $25
leq20$.

Answer:

7