4 1/4 + 1 2/3 equals​

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.

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.

Simplify using positive exponents only.