The correct answer should be y=4x + 1d where x equals the number of personal pizzas, and d equals the number of drinks.
She didn't account for the number of drinks ordered for more than one meal.
Answer:
12 sq mi
Step-by-step explanation:
base times height divided by 2
2x+4=3x+1 they've substituted y =2x+4 into the second eq.