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28-07-2020
Mathematics

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HELP

for his long distance phone service, tony pays a $5 monthly fee plus 9 cents per minute. last month, Tony's long distance bill was $17.96. for how many minutes was Tony billed?

Respuesta :

28-07-2020

Answer:

144 min.

Step-by-step explanation:

y=0.09x+5 ( x is the number of minutes, y is the bill amount)

17.96=0.09x+5

17.96-5=0.09x

x=12.96/0.09=144 minutes

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