Mathematics, 22.02.2021 01:00, kaylastronaut

Suppose that the credit remaining on a phone card (in dollars) is a linear function of the total calling time (in minutes). When graphed, the function gives a line with a slope of -0.14.
There is $35.88 in credit remaining on the card after 42 minutes of calls. How much credit was there after 30
minutes of calls?

Answers: 3

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Suppose that the credit remaining on a phone card (in dollars) is a linear function of the total cal...