What are the values of a, b, and c in the quadratic equation –2x2 4x – 3 = 0?

a. a = 2, b = 4, c = 3
b. a = 2, b = 4, c = –3
c. a = –2, b = 4, c = 3
d. a = –2, b = 4, c = – 3

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?