64 chairs are in a display .1/4 of them are red. how many are red

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

How can constraints be used to model a real-world situation?

Change negative exponents to positive. then solve. round to four decimal places