Dayana tried to simplify the following expression: `2\left(4x-5\right)`

She used the distributive property and multiplied `2\left(4x\right)` and `2\left(5\right)`. She ended up with

`8x\ +\ 10`

What was Dayana's mistake?

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.