Dave walked to his friend's house at a rate of 4mph and returned back biking at a rate of 10mph. If it took him 18 minutes longer to walk than to bike, what was the total distance of the round trip?

Through: (-3,-3) parallel to y= 7/3x+3

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.

Factor the polynomial by its greatest common monomial factor.