What is the x-coordinate of the solution for the system of equations? {y−x=9 10+2x=−2y enter your answer in the box. x =

Marquise has 200 meters of fencing to build a rectangular garden. the garden's area (in square meters) as a function of the garden's width w w (in meters) is modeled by: a ( w ) = − w 2 + 1 0 0 w a(w)=−w 2 +100w what side width will produce the maximum garden area? meters