The distance a spring will stretch varies directly with how much weight is attached to the spring. if a spring stretches 6 inches with 80 pounds attached, how far will it stretch with 55 pounds attached? round to the nearest tenth of an inch.

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.