Sam's plumbing service charges a $50 diagnostic fee and then $20 per hour. How much money does he earn, m, when he shows up to your house to do a job that takes h hours
Set up the cost equation:
m = Hourly Rate * h + service charge
Plugging in our numbers, we get:
m = 20h + 50
Set up the cost equation:
m = Hourly Rate * h + service charge
Plugging in our numbers, we get:
m = 20h + 50