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What is the 12th term of b(n)=-4-2(n-1)

Which table shows a proportional relationship between miles traveled and gas used?

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.