Math question

Which of the following are accepted without proof in a logical system? check all that apply.

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.

(x-5)1/2+5=2 what is a possible solution?