Give the degree and classify the polynomial by the number of terms. 2x + 1 a. degree: 0; monomial b. degree: 1; binomial c. degree: 0; binomial d. degree: 1; monomial

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?