A photograph that measures 16 cm by 10 cm is to be framed. The frame has the same width on all sides. (Call this length x. ) The picture and frame combined will have an area that is twice as big as the area of the photo alone. Determine the width of the fame.

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