5(picture) convergent and divergent series

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?

What is the equation of a line that passes through points (0, 4) and (-4,-8)?

The formula for the volume of a right square pyramid is given below, where a is the side length of the base and h is the height.