What number should replace the question mark? 
6-17-7-2
3-24-8-3
8-?-9-1

Just tell me how to set up the equation.

Adesigner charges a one time fee of $200 plus $40 an hour for each project. write an expression to represent how much money the designer will make for a project

Jenny earned a 77 on her most recent test jenny score is no less then 5 points greater then 4/5 of terrance’s score if t represents terrance score which inequality represents the situation