Which could be the measures of the three angles of an acute triangle? a. 40*, 90*, 50* b. 45*, 45*, 90* c. 25*, 25*, 130* d. 70*, 80*, 30*

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.