Jane wants to find the area of a trapezoid. to find the area of a trapezoid, add the two bases, multiply by the height, then divide by 2. the bases and height of the trapezoid are shown. represent the area of the trapezoid with a numerical expression.

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