Plz help need the answer

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

Find the solution(s) to the system of equations. select all that apply y=x^2-1 y=2x-2

Answer asap! show all work! find the number of complex roots, the possible number of real roots and the possible rational roots of the polynomial function. then, solve for all roots. x^3 + 2x^2 + 3x + 6 = 0