Estimate the difference between 206 and 167

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Finding tbe values of the variables in each kite

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.