Out of 45 customers at a breakfast café, 42 customers bought coffee or orange juice. There were 30 customers who bought orange juice and 40 customers who brought coffee. What is the probability that a randomly selected customer brought both coffee and orange juice? ​

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.