Agirl sold tickets to the circus. she sold 8 adult tickets and 5 child tickets for a total sales of $177.50 what is the equation and how much is the cost per adult and per child ticket?

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