Mathematics, 20.09.2021 15:00 cooper2017
The monthly cost (in dollars) of a long-distance phone plan is a linear function of the total calling time (in minutes). The monthly cost for 36 minutes of calls is $18.94 and the monthly cost for 85 minutes is $23.35. What is the monthly cost for 57 minutes of calls?
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The monthly cost (in dollars) of a long-distance phone plan is a linear function of the total callin...
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