Math i need help x-2y=1

Sunday: 1 1 2 monday: 1 tuesday: 2 1 2 wednesday: 1 3 4 thursday: 2 friday: 1 1 2 saturday: 2 jenna is a swimmer and trains every day. the schedule shown outlines the number of hours she trains each day. what is the total number of hours that jenna trains during the week?

What is the solution to the system of equations? (–2, –8) (–1, –5) (0, –2) (2, 4)

Which expression gives you the distance between the points (5,1)and(9,-6)