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Jessica needs to get her bicycle fixed. A mechanic charges $30 per hour of labor, and $45 for parts. The total cost for fixing Jessica's bicycle is $90. How
long did it take the mechanic to fix Jessica's bicycle?

Respuesta :

Answer:

It took the mechanic an hour and a half so 1.5 hour.

Step-by-step explanation:

If the mechanic charges $30 per hour + $45 for parts=75. If the total cost was $90 then 90(total cost)-75(for the first hour +parts) =15 and 30(cost of one hour)/2 is 15 which is half hour.

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