Solve the equation and express each solution in a + bi form.
x - 7² – 8=0

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.

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

Joanie wrote a letter that was 1 1/4 pages long. katie wrote a letter that was 3/4 page shorter then joagies letter. how long was katies letter