Evaluate the expression 3.14(a2 + ab) when a = 3 and b = 4. (input decimals only, such as 12.71, as the answer.)

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 expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.

What is the measure of angle x? a.101 b.158 c.44 d.79