68 P EVEILLARD, FRANCHETTE A group of x friends takes a trip to see a concert. The group rents a bus for transportation and buys a concert tic for each person. The group decides to split the total cost evenly. The cost, in dollars, each person is responsible for paying is represented by the expression shown. 18545x X What does 45 represent in the expression? A the cost of one concert ticket B the total cost of the transportation the total cost each person must pay