The length of P Q is (2 x + 5) centimeters and the length of R S is (4 x + 1) centimeters.
In parallelogram PQSR, what is PQ?

2 cm
5 cm
6 cm
9 cm

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?