What is the result of isolating x2 in the equation below? x2 + (y-5)2 = 30

Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

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 of the following are accepted without proof in a logical system? check all that apply.