Wages. joann works in the publicity office at the state university. she is paid $10 an hour for the first 35 hours she works each week and $15 an hour for every hour after that. if she makes $455 one week, how many hours did she work?

Well, the first 35 hours she works is $10 per hour.


So that's 350 already.

Subtract 350 from 455.


Our goal is to get 105.

After 35 hours, each hour after that she gets paid $15.
How many times can 15 go into 105?



We're done!
Take the first 35 hours she worked and add the 7 we got from our last equation.



She worked 42 hours to get $455 in one week.