Final answer:
To model the situation in a system of equations, we can let h represent the number of hot dogs bought and p represent the number of popcorn boxes bought. The system of equations that models this situation is: h + p = 9 and p = 2h - 3.
Step-by-step explanation:
To model the situation in a system of equations, we can let h represent the number of hot dogs bought and p represent the number of popcorn boxes bought.
From the given information, we know that the number of popcorn boxes Justin buys is three less than twice as many hot dogs:
p = 2h - 3
We also know that Justin buys a total of 9 snacks, so the total number of snacks bought is the sum of the hot dogs and popcorn boxes:
h + p = 9
The system of equations that models this situation is:
h + p = 9
p = 2h - 3