Debra purchased a prepaid phone card for $30. Long distance calls cost 16 cents a minute using this card. Debra used her card only once to make a long distance call. If the remaining credit on her card is $22.48, how many minutes did her call last?

The answer is 47 minutes.

You basically imagine this: Debra has a phone card for $30. She used x minutes every 16 cents. You end up with $22.48.

30 - (0.16x) = 22.48

You can basically graph that equation and the x-intercept will show you your answer. x = 47

i dont know

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idk

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