Use repeated sustraction or a number line to solve

Write the following as a base and exponent

Lydia collected two sets of data one set of data shows an outlier. which set has an outlier, and which number is the outlier?

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?