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20 October, 12:32

The credit remaining on a phone card is a linear function of the total calling time made with the card. The remaining credit after 45 minutes of calls is $14.60, and the remaining credit after 67 minutes of calls is $11.96. What is the remaining credit after 81 minutes of calls

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  1. 20 October, 14:20
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    If you need the answer so go to the google and search for problem
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