addison has her car fix for $170. if the parts were $80, what is the hourly rate for labor if she was billed for an hour and half?let e=the hourly charge.

Expert Answers
lfryerda eNotes educator| Certified Educator

Since the hourly rate is e, and the base cost is $80, with the total cost being $170, we need to solve the equation: 

`1.5e+80=170`

`1.5e=170-80`

`1.5e=90`   divide by 1.5

`e=90/1.5`

`e=60`

The hourly charge is $60/hour.