Mathematics, 21.11.2020 09:00 Tmerchy
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 43 minutes of calls is $18.98, and the remaining credit after 56 minutes of calls is $17.16. What is the remaining credit after 65 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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