You are planning a camping trip. The campsite you want to rent charges a $15 fee to reserve the site, plus an extra $3 per day. How much would it cost to camp for a week? If you had $40 to spend, how long could you stay?

Dean and karlene get paid to write songs. dean is paid a one-time fee of $20 plus $80 per day. karlene is paid a one-time fee of $25 plus $100 per day. write an expression to represent how much a producer will pay to hire both to work the same number of days on a song.