Which of the following lists of ordered pairs is a function? A. (1,2), (1,-2), (3,2), (3,4)
B. (2,4), (0,2), (2,-4), (5,3)
C. (0,2), (2,3), (0,-2), (4,1)
D. (1,6), (2,7), (4,9), (0,5)

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.)

There are 15 plates and each plate is either 7 or 12 inches diameter. which systems of equations do you use to find the number of 7 inch plates, x and 12 inch plates, y

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?