Mathematics, 25.10.2019 01:43 weberalycia

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 34 minutes of calls is 19.56, and the remaining credit after 47 minutes of calls is 17.48. 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...

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