Sam needs to figure out how much purple paint to buy. Calculate for her the total area, in square feet, of the four walls.
She will not paint the door or windows.

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.