Pls help the due date is in 2 days

Marcus needs to rewrite f(x) = x2 + 6x + 4 in vertex form.

Which inequality comparing two of the expressions is true when 0.7 < x < 0.9

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.