Chau started a test at 8:47 AM and finished it at 9:12 AM. How long did it take him? Give your answer in minutes.

What is (28 + 7 + 6 + 3) x 1/2 show your work

Jordan rides his bike 6 7/15 miles every day to deliver newspapers and to go to and from school. if his ride to and from school is 4 3/10 miles, how many miles is the trip to deliver newspapers? 1 1/3 1 1/6 2 1/6 2 4/5

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?