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 remain

Question

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 31 minutes of calls is $21.28, and the remaining credit after 69 minutes of calls is $16.72. What is the remaining credit after 76 minutes of calls?

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Anna 3 weeks 2021-12-29T00:37:45+00:00 1 Answer 0 views 0

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    2021-12-29T00:39:04+00:00

    Answer:

    $15.88

    Step-by-step explanation:

    \frac{(21.28 - 16.72)}{(69-31)}

    $4.56 / 38 min

    $0.12 / 1 min

    76 – 69 = 7 minutes

    7 x .12 = .84

    16.72 – .84 = 15.88

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45:7+7-4:2-5:5*4+35:2 =? ( )