Help please I don’t understand

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

Astore has clearance items that have been marked down by 60%. they are having a sale, advertising an additional 55% off clearance items. what percent of the original price do you end up paying?

Sue's average score for three bowling games was 162. in the second game, sue scored 10 less than in the first game. in the third game, she scored 13 less than in the second game. what was her score in the first game?