C = 10m + 30, where C is total cost and m is # of months
C = 10(5) + 30
C = 50 + 30
C = $80
$160 = 10m + 30
160 - 30 = 10m
130/10 = m
m = 13 months
Hope that helps
Answer: <em>one solution.</em>
Step-by-step explanation:

<em>This equation has one solution: x = 6.</em>
For one sweater it would be $10.88 but if she got 3 it would be $32.64
10.88•8=32.64
The answer to your problem is 7/10=0.7
7/10 as a decimal is 0.7