How could you predict that jermaine's answer might be incorrect using your estimate

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.

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?

Which of the following is another way to express the difference between -5 and 8?