What is the slope of a line perpendicular to the line whose equation is x + 3y = -15. Fully reduce your answer.

What number must you add to complete the square x^2+12x=16

Enter the number of complex zeros for the polynomial function f(x) = x 4+ 5x² +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.