A plumber uses the equation c = 35h + 70 to determine the total amount of money charged for a service call, where h represents t
he number of hours worked and 70 represents a one-time fee. Based on this equation, how much should she/he charge for working 1.5 hours on a service call when no parts are required?
All you have to do is plug in the number(s). In this case, you put 1.5 in for "h", and you multiply 35 by 1.5, which gets you 52.5, then you just add 70, which gets you 122.50.
