Proportional Relationships

Yu Yan competes in a sprint triathlon. The race consists of three parts: a 0.5 - mile swim, a 12.4 mile bike ride, and a 3.1 mile run. Yu Yan completes the swim portion of the sprint triathlon in 25 minutes. What is her average swimming speed in miles per minute?

• 0.02 miles/1 minute

• 0.03 miles/1 minute

• 0.04 miles/1 minute

• 0.05 miles/1 minute

Yu Yan competes in a sprint triathlon. The race consists of three parts: a 0.5 - mile swim, a 12.4 mile bike ride, and a 3.1 mile run. Yu Yan completes the swim portion of the sprint triathlon in 25 minutes. What is Yu Yan's average swimming speed in miles per hour?

• 1.8 miles/1 hour

• 1.6 miles/ 1 hour

• 1.4 miles/1 hour

• 1.2 miles/ 1 hour

Yu Yan competes in a sprint triathlon. The race consists of three parts: a 0.5 - mile swim, a 12.4 mile bike ride, and a 3.1 mile run. Yu Yan completes the swim portion of the sprint triathlon in 25 minutes. Write an equation relating the total distance Yu Yan swims d in miles to the number or minutes she swims m.

• d = 0.04m

• d = 0.02m

• d = 0.03m

• d = 0.01m

Yu Yan competes in a sprint triathlon. The race consists of three parts: a 0.5 - mile swim, a 12.4 mile bike ride, and a 3.1 mile run. Yu Yan completes the swim portion of the sprint triathlon in 25 minutes. Write an equation relating the total distance Yu Yan swims d in miles to the number of hours she swims h.

• d = 1.3h

• d = 1.8h

• d = 1.2h

• d = 1.7h

Yu Yan competes in a sprint triathlon. The race consists of three parts: a 0.5 - mile swim, a 12.4 mile bike ride, and a 3.1 mile run. Yu Yan completes the swim portion of the sprint triathlon in 25 minutes. Part of the swim portion of the race involves swimming the full length of a pier, which is 0.2 miles long. Yu Yan swims at her average speed. How many minutes does it take Yu Yan to reach the end of the pier?

• 20 minutes

• 10 minutes

• 25 minutes

• 15 minutes

Yu Yan competes in a sprint triathlon. The race consists of three parts: a 0.5 - mile swim, a 12.4 mile bike ride, and a 3.1 mile run. Yu Yan completes the bike ride in 48 minutes. What is her average biking speed in miles per hour?

• 15.5 miles/1 hour

• 12.5 miles/1 hour

• 16.5 miles/1 hour

• 14.5 miles/1 hour

Yu Yan competes in a sprint triathlon. The race consists of three parts: a 0.5 - mile swim, a 12.4 mile bike ride, and a 3.1 mile run. Yu Yan completes the bike ride in 48 minutes. Write an equation relating the total distance Yu Yan bikes d to the time in hours she bikes h.

• d = 16.5h

• d = 15.5h

• d = 12.5h

• d = 20.5h

Yu Yan competes in a sprint triathlon. The race consists of three parts: a 0.5 - mile swim, a 12.4 mile bike ride, and a 3.1 mile run. Yu Yan's friends are waiting to cheer for her at a place that is 6.2 miles from the start of the bike race course. Using the equation, d = 15.5h, how many minutes does Yu Yan bike before reaching her friends?

• 30 minutes

• 27 minutes

• 35 minutes

• 24 minutes

A lawnmower uses 0.75 gallons of gasoline in 50 minutes of mowing. How many gallons of gasoline does the lawnmower use in an hour of mowing?

• 0.10 gallons/1 hour

• 0.8 gallons/ 1 hour

• 0.6 gallons/ 1 hour

• 0.9 gallons/1 hour

A lawnmower uses 0.75 gallons of gasoline in 50 minutes of mowing. Write an equation to relate the number of gallons of gasoline g that the lawnmower uses to the time spent mowing h in hours.

• g = 0.1h

• g = 0.8h

• g = 0.9h

• g = 0.2h