Which statements are true? check all that apply

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.

Three times the sum of a number and seven is negative thirty-six. what is the number?

Rose bought a new hat when she was on vacation. the following formula describes the percent sales tax rose paid b=t-c/c