Once again, i’ve given up all hope pls make me the happiest girl in the world and help me mwah :,)

Np4=12np2 with clear explanation.

Giuseppi's pizza had orders for $931.00 of pizzas. the prices were $21 for a large pizza, 514 for a medium pizza, and $7 for a small pizza. the number of large pizzas was two less than four times the number of medium pizzas. thenumber of small pizzas was three more than three times the number of medium pizzas. how many of each size of pizza were ordered?

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?