At a middle school, 40% of seventh graders have taken swimming lessons. If there are 250 studnets in the
seventh grade, how many of them have taken swimming
lessons?

Jack has a rectangular piece of land, the area of which is represented by a1 = 9.5l. his brother has a different rectangular piece of land, the area of which is represented by a2 = l(14 − l). let a represent the area in square meters and l represent the length in meters of the pieces of land. the two equations plotted on a graph meet at a point as shown in the image