Which equation best represents the situation?
cara served pizza and punch at a party. each pizza fed 6 people, and each guest received a glass of punch. if a glass of punch cost 50¢ and cara spent $2.50 for each guest, what was the cost of each pizza?

a. x/6 + 0.50 = 2.50

b.6x + 0.50x = 2.50

c. x/6 + 50 = 2.50

d.6x - 2.50 = 0.50