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Knowledge Check
Question 10
Keith purchased a prepaid phone card for $50.75. Calls cost 8 cents a minute using this card. The credit, C (in dollars), left on the card after it is used for x
minutes of calls is given by the following
C=50.75-0.08x
How much credit is left on the card after Keith uses it for 30 minutes of calls

Respuesta :

The credit that is left on the card after Keith uses it for 30 minutes of calls is $48.35.

How to calculate the cost?

From the information given, Keith purchased a prepaid phone card for $50.75. Calls cost 8 cents a minute using this card

The equation was given as C=50.75-0.08x

Therefore, the credit that is left on the card after Keith uses it for 30 minutes of calls will be:

C=50.75-0.08x

C = 50.75 - 0.08(30)

C = 50.75 - 2.40

C = $48.35

The credit is $48.35.

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