Question

Joanna joins a CD club. She pays $7 per month plus $10 for each CD that she orders. Write an inequality to find how many CDs she can purchase in a month if she spends no more than $100. Identify what your variable represents.

Answer 1

CD = c

7 + 10c < 100 (there is supposed to be a line under the inequality sign)
-7 -7
10c < 93
Divide both sides by 10
c < 9.3

She can only buy 9 CDs.