Mike had a jar of nickels that had five more nickels than he originally thought. if the total amount of nickels was $4.35, how many nickels did mike think he had originally?

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.