3. (6a? - 8a +9) + (5a3 – 12a? - 1) 4. (8y2 – 15y-5)-(-2y2 – 4y + 20)
I want the answer and the steps

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

Someone answer this asap for the first five terms of a sequence are shown. 5, 11, 23, 47, 95, . . which recursive function defines the nth term in the sequence for n > 1? a. f(n) = f(n - 1) + 6 b) f(n) = f(n - 1) + 48 c) f(n) = 3 • f(n - 1) + 1 d) f(n) = 3 • f(n - 1) - 4