Chose 1
A (1/3,2 5/6)
B (2/3,3 2/3)
C (-1/3,1 1/6)
D (-2/3,1/3)

Determine whether the quadrilateral below is a parallelogram. justify/explain your answer (this means back it up! give specific information that supports your decision. writing just "yes" or "no" will result in no credit.)

X+ y = 5 ; x - y =3 solve using linear combination

Determine which postulate or theorem can be used to prove that lmn =nmo