Find solution y ( -7-y)=0

What are the solutions of the following system? y=-2x^2 y=x-2

David and alton are training for a race. they spend 35 minutes stretching and then go on a 5 mile practice run. david runs at a pace of 7 min/mile. alton runs at a pace of 8 min/mile. write an equation for each runner that shows the total length of their workout. then solve each equation showing your work

What is the benefit of converting measures in a ratio to the same unit