Below are the supply and demand equations for umbrellas in a certain market. In these equations, p represents price, D represents demand, and S represents supply. D = StartFraction negative 4 over 3 EndFraction p 22 S = 3 p minus 36 What is p at the point of equilibrium, to the nearest tenth? a. 19. 3 b. 16. 5 c. 13. 4 d. 12. 0.

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.