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Mona's bank charges a $10 fee per month plus a $0.12 fee per check. The formula below gives f, the total fee in dollars for a month in which Mona writes n checks.

f=10+0.12n
How many checks did Mona write during a month in which her total fee was $12.52?

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rdacoder

Answer: Mona wrote 21 checks during a month where her total fee was $12.52

Step-by-step explanation:

f = 10 + 0.12n

12.52 = 10 + 0.12n

[tex]\frac{2.52}{0.12}[/tex] = [tex]\frac{0.12n}{0.12}[/tex]

n = 21

Mona wrote 21 checks during a month where her total fee was $12.52

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