Lennon has 6 hours to spend in Ha Ha Tonka state park. He plants to drive around the park at an average speed of 20 miles per hour, looking for a good trail to hike. Once he finds a trail he likes, he will spend the remainder of his time hiking it. He hopes to travel more than 60 miles total while in the park. If he hikes at an average speed of 1.5 miles per hour, which of the following system of inequalities can be solved for the number of hours Lennon spends driving d, and the number of hours he spends hiking,h, while he is at the park?

A man drove to work at an average rate of speed of 60 miles per hour and returned over the same route driving at an average rate of speed of 40 miles per hour. If his total driving time was 1 hour, what was the total number of miles in the round trip?

Waugh jogged to a restaurent at x miles per hour, and jogged back home along the same route at y miles per hour. He took 30 minutes for the whole trip. If the restaurant is 2 miles form home along the route he too, what is the average speed in miles per hour at which he jogged for the whole trip ?

A cyclist travels 20 miles at a second of 15 miles per hours. If he returns along the same path and the entire trip takes 2 hours, at what spped did he return?

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?

He spends his money lavishly.

A man motors from A to B. A large part of the distace is uphill and he gets a mileage of only 10 miles per gallon of gasoline. ON the return trip, he makes 15 miles per gallon, then the average of his mileage (assuming that the distance from A to B is 60 miles ) is

A man motors from A to B. A large part of the distace is uphill and he gets a mileage of only 10 miles per gallon of gasoline. ON the return trip, he makes 15 miles per gallon, then the average of his mileage (assuming that the distance from A to B is 60 miles ) is

Andrew drove from A to B at 60 miles per hour. Then he realized that he forgot something at A, and drove back at 80 miles per hour. He then zipped back to B at 90mph. What was his approximate average speed in miles per hour for the entire trip?

Brian plans to complete a 100-mile bike race for charity. According to his registration materials, he will need to ride at an average speed of 12.5 miles per hour if he wants to complete the course before it closes. On a pratice ride the week before the race, Brain rides 60 miles and trackes his speed. For the first 30 miles, his average speed is 16 miles per hour, and for the next 30 miles, his average speed is 15 miles per hour. If Brian can match these speeds for the first 60 miles of the charity race, then he rests for that total of 1 hour after that, what approximately speed must he maintain for the last 40 miles in order to complete the ride on time?