Write an equation for the linear function and use it to answer the given question.  You can rent time on computers at the local copy center for a $7 setup charge and an additional $4 for every 10 minutes. How much time can you rent for $24?

A. r = 7 + 0.4t; 42.5 minutes
B. r = 7 - 0.4t; 77.5 minutes
C. r = 7t - 0.4; 3.49 minutes
D. r = 7t + 0.4; 3.37 minutes


Answer: A

Mathematics

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