1 Two planes have left the L.A. airport. One plane is 70 miles west of the airport and has an altitude of 8 miles, while the other plane is 20 miles east of the airport and has an altitude of 2 miles. What is the distance between the planes?
2 If the midpoint of two points is ( 3/4, -6/7 ), and one of the points is (7,-5), find the other point.