SAT, 19.08.2021 03:20 dekarouh

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 22 minutes of calls is $26.48, and the remaining credit after 43 minutes of calls is $23.12. What is the remaining credit after 51 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...