Pls help asap no wrong answer pls

What is the least common multiple of 16 and 3?

Joe has some money in his bank account he deposits 45$ write an expression that represents the amount of money in joe's account

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.