The ice skating rink charges an hourly fee for skating and $3 to rent skates for the day. Gillian rented skates and skated for
1 answer:
Answer: C(x) = 3x + 3
<u>Step-by-step explanation:</u>
C(x) = mx + b
Given: when x = 3 hours, C(x) = $21 total charge, b = $3 skate rental
21 = 3m + 3
18 = 3m
6 = m
Answer for any given x is: C(x) = 3x + 3
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