Me simplify this rational expression

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?

What is the arc length of the subtending arc for an angle of 72 degrees on a circle of radius 4? o a. 8a oc. 16 t d. 8

Point m is located at (-4, -6). what is located 4 units from point m? ( its on a coordinate plane by the way. )