Melody went to the movies with some of her friends. The tickets cost $6.50 each and the group spent $17.50 on snacks. In total, the group paid $63.00. How many people went to the movies in that group? Leave your answer as just a number.

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.