How do i solve this problem step by step?

Find the sum of the measure of the interior angles of a polygon of 9 sides ; of 32 sides

(08.01)consider the following pair of equations: x + y = −2 y = 2x + 10 if the two equations are graphed, at what point do the lines representing the two equations intersect? (−4, 2) (4, 2) (−2, 4) (2, 4)

Solve this and show you’re work step by step ! -5 3/4+3h< 9 1/4 -