Aboard 83 inches long is to be cut into three pieces for framing. the longest piece must be twice the length of the middle-sized piece, and the shortest piece must be 21 inches shorter than the middle-sized piece. write an equation to find the length of each of the three pieces

Angle xyz is formed by segments xy and yz on the coordinate grid below: a coordinate plane is shown. angle xyz has endpoints at 3 comma negative 1 and 6 negative 2 and 3 comma negative 3 and measures 36.87 degrees. angle xyz is rotated 270 degrees counterclockwise about the origin to form angle x′y′z′. which statement shows the measure of angle x′y′z′?