Suppose you have been tasked with regulating a single monopoly firm that sells 50-pound bags of concrete. the firm has fixed costs of $10 million per year and a variable cost of $3 per bag no matter how many bags are produced.

Which statement explains how you could use coordinate geometry to prove the opposite sides of a quadrilateral are congruent? a. use the slope formula to prove the slopes of the opposite sides are the same. b. use the slope formula to prove the slopes of the opposite sides are opposite reciprocals. c. use the distance formula to prove the lengths of the opposite sides are the same. d. use the distance formula to prove the midpoints of the opposite sides are the same.