Question

Debbie's bank offers an online bill pay service. For this, the bank charges $2.25 per month plus $0.10 per bill paid using the service. How many bills does she pay each month if the charges are always between $3.50 and $5.00? (Note: She is not allowed to pay part of a bill.)

Answer 1

Based on the information given, the number of bills will have to be between 13 and 28 every month.

Solving equations

Let the number of bills be represented by x.

Therefore, the equation to solve the question will be:

2.25 + (0.10 × x) = 3.50

2.25 + 0.10x = 3.50

0.10x = 3.50 - 2.25

0.10x = 1.25

x = 1.25/0.10 = 12.5 = 13

Also, 2.25 + 0.10x = 5.00

0.10x = 5.00 - 2.25

0.10x = 2.75

x = 27.5 = 28

Therefore, the number of bills will be between 13 and 28 every month.

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