Kelly bought a book of 20 stamps. she has used 80% of them. a. how many stamps has kelly used? b. how many stamps does she have left?

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?

How do i do this activity, is appreciated

Janet drove 300 miles in 4.5 hours. write an equation to find the rate at which she was traveling