What is the length of ED?

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

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply