Question

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The cost  CC  (in dollars) of making  n  watches is represented by  C=15n+85 C=15n+85 . How many watches are made when the cost is $385?

The cost CC (in dollars) of making nn watches is represented by C=15n+85C=15n+85. How many watches are made when the cost is $385?

Answer 1

C = 15n + 85....when C = 385

385 = 15n + 85
385 - 85 = 15n
300 = 15n
300/15 = n
20 = n <== 20 watches were made