Answer:
The correct option is 3.
Explanation:
The amount Katie should pay is defined by the given expression.
.... (1)
Katie bought following item:
Number of bottles of milk = 6
Number of bags of candy = 7
Number of pizza = 1
cost of a pizza = $11
Let x be the cost of a bottle of milk and y be the cost of a bag of candy.
Then the total amount Katie should pay is
.... (2)
On comparing (1) and (2), we get
![x=y](https://img.qammunity.org/2020/formulas/mathematics/middle-school/c2boaggbwsxssbj7nz8f52mlxyfafcurc7.png)
It means the cost of each bottle of milk is the same as the cost of each bag of candy.
Therefore the correct option is 3.