Mathematics, 28.02.2021 18:30 giannimaraj711

A basic cellular package costs $30 per month for 60 minutes of calling, with an additional charge of $0.50/min beyond that time. The cost formula would be C = 30 +0.50(x - 60), where is the cost measured in dollars and x is the number of calling minutes used. If you cannot have a bill greater than $80, what is the maximum
number of calling minutes you can use?
min
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