Marlene rides her bicycle to her friend jon's house and returns home by the same route. marlene ride her bike at constant speeds of 9 mph on level ground, 6 mph going uphill and 18 going downhill. if her total riding time was 2 hrs, how far is it to jon's house.

The correct answer would be 99 miles. This will be done using the formula: distance = rate (miles) X time (hours). In this case, D= (9+6+18) X 2. So the answer is 99 miles. Thank you for posting your question. I hope this answer helped you. Let me know if you need more help.