me and fast the cost to rent a hall for alysa's sweet sixteen birthday party is $300. her mom said she must keep the party cost to no more than $5.00 a person. she watched her mom write an expression on her notes that is listed below. what does the variable represent in this expression? 300+200 x a. the number of people attending b. the amount to rent the hall c. the amount of food d. the total cost of the party