Question

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

Answer 1

20=n

Explanation:

Take 385 and subtract 85. You get 300. Divide 300 by 15n. You get 20.

20=n

If you want to double check, replace n with 20 so the equation is

C=(15x20)+85

Hope I help!