The trip odometer of an automobile improperly displays only 3 miles for every 4 miles actually driven. If the trip odometer shows 42 miles, how many mileshas the automobile actually been driven?

Lauren rode her bike from her house to a friend's house 3 1/2 miles away. On the first leg of her trip , she rode uphill at 3 miles per hour. The second part of the trip covered a larger distance but was downhill, and Lauren rode at 5 miles per hour. If the downhill part of the ride took half an hour, how many minutes did the uphill part take ?

Rory left home and drove straight to the airport at an average speed of 45 miles per hour. He returned home along the same route, but traffic slowed him down and he only averaged 30 miles per hour on the return trip. If his total travel time was 2 hours and 30 minutes, how far is it, in miles, from Rory's house to the airport?

On a map, 1/4 inch represents 16 actual miles. Two towns are 2 3/4 inches apart on this map are how many actual miles apart?

On a certain map, (3)/(8) of an inch represents 120 miles. How many miles does 1(3)/(4) inches represent?