Which of the following represents the most accurate estimation of 5 + 4

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.)

Evaluate the expression. (9 + 5)(3 + 2)0

Which expression is rational? 6. , square root two, square root 14, square root 49