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14-09-2022
Mathematics

Answered

II
Finding outputs of a two-step function with decimals that model...
Leila purchased a prepaid phone card for $20.50. Calls cost 15 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=20.50-0.15.x
How much credit is left on the card after Leila uses it for 30 minutes of calls?

Answer :

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