Help, please
I HAVE NO CLUE

Which expression gives the area of the triangle shown below

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?

Use pascal's triangle to find the missing values. x4 - 4xb + 6x2 - ax + 1