Mathematics, 31.10.2019 01:31 royaltyjl11
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 47 minutes of calls is $16.06 and the monthly cost for 89 minutes is $21.52 . what is the monthly cost for 78 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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