1 a. 
Noah travels in an airplane a distance of 3240 miles. For onehalf of the distance, the airplane flies at a speed of 600 miles per hour, and for the rest of the distance, it flies at a speed of 820 miles per hour. How long does the trip take?


2 a. 
Emily's airplane trip took 4.2 hours. For onehalf of that time, the airplane flew at a speed of 560 miles per hour, and for the rest of the time, it flew at a speed of 660 miles per hour. What distance did Emily travel?


3 a. 
Abigail travels in an airplane a distance of 3600 km. For onehalf of the distance, the airplane flies at a speed of 960 km/h, and for the rest of the distance, it flies at a speed of 880 km/h. How long does the trip take?

