The area of a square is defined by, a(x) =x2 - 18x + 81. find a polynomial expression that represents the length of the side of the square. a.) (x - 2) b.) (x - 3) c.) (x - 6) d.) (x - 9)

Sophia wrote an equation to represent the revenue of a movie theater for one day. she let x represent the number of child tickets sold and y represents the nunver of adult tickets sold. if a child ticket cost $4, an adult ticket cost $6, and the total revenue for the daybwas $420, which equation could sophia use to represent the number of chikd and adult tickets that were sold?