What is the error and what can you do to fix it?

100 points, hi, i’m not sure how to get the equation from the graph and table.

Find the solution of this system of equation -7x+y=-20 9x-3y=36

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers