Write the equation of the line graphed at the right(please help I really need this)

For which pair of functions is (gof)(a)=|a|-2?

Find the equation of the line with slope =8 and passing through (6,53) write your equation in the form y=mx+b

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?