An office manager is renting a local hall for an upcoming event. The hall costs $140. The food costs $12 per person. The office manager is not sure how many people will attend. Which quantity is not a variable quantity the cost to rent the hall, the number of people who will attend, or the total cost of the food?

Choose the correct answer below.

the total cost of the food

the cost to rent the hall

the number of people who will attend
I will Mark your answer brainliest if you get it right

(50 ) mrs. julien’s and mrs. castillejo’s classes are selling cookie dough for a school fundraiser. customers can buy packages of macadamia nut chip cookie dough and packages of triple chocolate cookie dough. mrs. julien’s class sold 25 packages of macadamia nut chip cookie dough and 30 packages of triple chocolate cookie dough for a total of $221.25. mrs. castillejo’s class sold 5 packages of macadamia nut chip cookie dough and 45 packages of triple chocolate cookie dough for a total of $191.25. (a) write the system of equations that model the problem. be sure to explain which equation represents which situation. (b) find the cost of each type of cookie. show your work. (c) explain which method you used to solve the system and why you chose that method.