Which statements are true? Check all that apply.
mco = 120°
MCB = 60°
m angle COB = 2(m 2CAB)
m angle COB = 120°
mZCOB = 1/2 (mZCAB)

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.