Mathematics
Mathematics, 05.10.2019 13:30, cchavcchav9606

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 37 minutes of calls is $24.08 and the remaining credit after 66 minutes of calls is $19.44 what is the remaining credit after 69 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 made...

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