Choosing the 5 winning lottery numbers when the numbers are chosen at random from 0 to 9

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.)

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x

What is the result of adding the system of equations? 2x+y=4 3x-y=6