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If you have 120 feet of fencing and want to enclose a rectangular area up against a long, straight wall, what is the largest area you can enclose?

Respuesta :

Nirina7
the area of rectangular is  A= length x width
 
  120 feet of fancing = ---------------------------------- (the above line)


        !-----------------------------------------!                                     
        !                                                   !
     x !   the enclosed area                 ! x
        !                                                   !
        !---------------------------------------- !
                          120 -(x+x)
so the area is  A = (120-2x) (x)= 120x-2x²



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