13. The length of a room is 4.5 feet longer than the width, w, of the room. Write an expression that represents the perimeter of the rectangular room.

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .