math
posted by melissa .
a rectangular field measures 20 meters by y meters is surrounded by grass patch of width 2 meters . What is the area of the grass patch ? Leave your answer in the simplest form in terms of y .

( 20 + 2 + 2 ) * ( y + 2 + 2 ) =
( 20 + 4 ) * ( y + 4 ) =
24 * ( y + 4 ) =
24 y + 24 * 4 =
24 y + 96 [ m ^ 2 ]