Which expression is equal to 4 square 20 -3 square 45

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

The fraction 7/9 is equivalent to a percent that is greater than 100%. truefalse

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?