SOLUTION: it costs $900 for the 10,000 mile service on a car. If the parts were $720 and the mechanic charged $90 per hour, how many hours did the service take?
Algebra.Com
Question 1027400: it costs $900 for the 10,000 mile service on a car. If the parts were $720 and the mechanic charged $90 per hour, how many hours did the service take?
Answer by fractalier(6550) (Show Source): You can put this solution on YOUR website!
Call the amount of hours he spent working, h.
Then we have as our setup
900 = 720 + 90h
Now subtract 720 from both sides and get
180 = 90h
Now divide by 90 and get
h = 2 hours
RELATED QUESTIONS
Two mechanics worked on a car. The first mechanic worked for
10
hours, and the second... (answered by Boreal)
Two mechanics worked on a car. The first mechanic charged 65$ per hour, and the second... (answered by Alan3354)
two mechanics worked on a car. the first mechanic charged 65$ per hour. the second... (answered by Alan3354)
An engine repair cost a truck owner $1,406 in parts and labor. If the parts were $670 and (answered by josmiceli)
a mechanic charges a diagnostic fee of $ 35, plus $42.50 per hour for labor. If ur bill... (answered by Nate)
Two mechanics worked on a car. The first mechanic worked for 10 hours, and the second... (answered by stanbon)
Two mechanics worked on a car. The first mechanic worked for 10 hours, and the second... (answered by algebrapro18)
Two mechanics worked on a car. The first mechanic worked for
10
hours, and the second (answered by dkala99)
Two mechanics worked on a car. The first mechanic worked for
10
hours, and the second (answered by rothauserc)