Joanna joins a cd club. she pays $7 per month plus ten for each cd she orders. write an inequality to find how many cd's she can purchase in a month if she spends no more than $100. identify wht your variable represents

I am using my brain right now so if i get it wrong im sorry.

I think 20 CD's she bought

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post