If necessary, round your answers to 1 decimal digit.

1 a. Nancy travels in an airplane a distance of 2520 miles. For one-third 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 700 miles per hour. How long does the trip take?

 
 
 
 
 
 
 
 
 
2 a. Grace rides her bike 23.1 miles with a constant speed of 7 mph and another 57.8 miles with a constant speed of 11 mph. What is her average speed for the total trip?

 
 
 
 
 
 
 
 
 
3 a. David travels in an airplane a distance of 1620 miles. For one-third of the distance, the airplane flies at a speed of 660 miles per hour, and for the rest of the distance, it flies at a speed of 500 miles per hour. How long does the trip take?

 
 
 
 
 
 
 
 
 
Page 2

Answer Key

1 a. The trip takes 3 hours and 48 minutes or 3.8 hours.
2 a. Her average speed is 9.5 mph.
3 a. The trip takes 2 hours and 58 minutes or 3 hours.

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