Problem solving: xavier made 25 pounds of roasted almonds for a fair. he has 3 1/2 pounds left at the end of the fair. how many pounds of roasted almonds did he sell at the fair?

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.