What is the sum of the interior angels of a triangle?​

Which graph represents the equation y =4x

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?

Isaac wants the equation below to have no solution when the missing number is placed in the box. which number should he place in the box?