Add and simplify (-4+n-2n^2)+(2-5n-6n^2)

Acar travels at an average speed of 56 miles per hour. how long does it take to travel 196 miles

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?

Y= a(x-3)squared-1 what is the value of a