Me with this write the formula for finding the nth term of an arithmetic sequence, where a(n) is the nth term of an arithmetic sequence, a is the first term, n is the term number and d is the common difference.

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.