Prove: among any 9 points in a unit square, there are 3 points that form a triangle (with the points as vertices) with area no more than 1/8 .

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.