Which of the following illustrates the commutative
property of addition?
0 17 + 4 + 21 = 21 + 21
0 17 + -17 = 0
17 + 0 = 17
0 17 + 4 = 4 + 17

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.