What is the average of 4, 7, 8, 13, 18, 18, 21?

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?

Adele is five years older than timothy. in three years, timothy will be 2/3 of adele’s age. what is adele‘s current age?

An equation in slope-intersept form the lines that passes thought (-8,1) and is perpindicular to the y=2x-17.