Combine the like terms to create an equivalent expression: −2x − x + 8 will mark brainliest!

If ac = 12 and ab=7 is it possible that bc =10

The center of a circle represent by the equation (x+9)^2+(y-6)^2=10^2 (-9,6), (-6,9), (6,-9) ,(9,-6)

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.