Define a variable for the unknown.

User Generated

Apuevdhv

Mathematics

Description

Vicky has a cell-phone plan that charges $45 per month and $0.15 for every minute that she uses the phone beyond what her plan allows. Last month, she was billed $54.60.

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Explanation & Answer

45+0.15 x = 54.60

0.15x = 9.60

15x = 960

x = 960/15 = 64 minutes


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