Which one is it? I really need help

What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

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.

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.