Triangle PQR with vertices P(-2,3), Q(2,4), and R(1,-1) in the line x=-3

Me, prove a quadrilateral with vertices g(1,-1), h(5,1), i(4,3) and j(0,1) is a rectangle using the parallelogram method and a rectangle method.

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

What would be the reasons for lines 3 and 4? a. addition property; subtraction property b. addition property; solve c. substitution property; subtraction property d. substitution property; prove