Mathematics, 29.09.2020 17:01 emanuelmorales1515
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 21
minutes of calls is $26.85, and the remaining credit after 32 minutes of calls is $25.20. What is the remaining credit after 42 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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