Mathematics, 29.08.2019 23:30 ronaldhernandez598
The credit remaining on a phone card (in dollars) is a linear function of the total calling time made with the card (in minutes). the remaining credit after 40 minutes of calls is $25.20, and the remaining credit after 72 minutes of calls is $21.36. what is the remaining credit after 86 minutes of calls?
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The credit remaining on a phone card (in dollars) is a linear function of the total calling time mad...
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