What is the value of the expression: 4+42 +22

X+y=-4 x-y=2 use elimination with adding and subtraction

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?

Given: ab ≅ bc and ao ≅ oc ok − angle bisector of ∠boc find: m∠aok