13. solve.

pls

What expression is equivalent to 42x-56y

Plz ( true - false) all triangles have interior angles whose measure sum to 90.

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