Question

Riley‘s parents got a cell phone plan that has $40 monthly fee for the first stone. For each extra phone bill, there is a $15 phone service charge and $10 text service charge. What was the total phone bill be if they were five extra phones on the plan

Answer 1

First phone out of 5: $40
The following 4 phones: 4(15 + 10) = $100
$100 + $40 = $140.

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