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Mathematics, 05.09.2021 20:00 b2cutie456

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 $22.27, and the remaining credit after 30 minutes of calls is $20.45. What is the remaining credit after 45 minutes of calls? PLEASE ANSWER.

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