Hermina cut a 10" by 20" piece of cardboard down the diagonal. What is the length c of the cut, in inches?

Name the most appropriate metric unit for each measurement

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !

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.