Zander wants to find out what the most popular sporting event is in the district’s high schools. He surveys a sample of the population. Under which condition is surveying a sample valid?

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.)

What expression is equivalent to 42x-56y

Lines b and c are parallel. what is the measure of 2? m2 = 31° m2 = 50° m2 = 120° m2 = 130°