NEED ANSWER ASAP (with work)

the diagram below shows a pentagon. Find the value of X.

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

What is the slope of the line shown below?

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.