Pls help this one is hard 25 points

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

There were 25 students who answered to a survey about sports. four-fifths of them like football. how many students like football?

A)a square brown tarp has a square green patch green in the corner the side length of the tarp is (x + 8) and the side length of the patch is x what is the area of the brown part of the tarpb)a square red placemat has a gold square in the corner the side length of the gold square is (x - 2) inches with the width of the red region is 4 in what is the area of the red part of the placemat