Write a fraction setting the vertical length of the smaller triangle over its horizontal length. What does this fraction represent?

This is about circle theorems. someone asap : (

Tan198=asin164=? how to solve this? ?

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?