What can be added to 2 to give us -6

The interior angles formed by the side of a hexagon have measures of them up to 720° what is the measure of angle a

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?

If f(x) and g(x) are inverse functions of each other, which of the following shows the graph of f(g(x)