Answer the image. also, you don't need to explain your answer.

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1