8 boxes is $9.67
15 boxes is $18.30
Step-by-step explanation:
8 boxes are $9.76 and 15 boxes are $18.30
Find the unit rate by dividing 3.65/3 ≈ 1.22
Multiply 1.22 by 8 which is 9.76
Multiply 1.22 by 15 which is 18.30
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step-by-step explanation: