Answer:
Step-by-step explanation: Each Notebook Cost $4
If haley Bought 1 Backpack That Was $36 Dollars, Subtract The Number 36 From The Total Amount She Paid For Everything. 48-36 = 12.
If She Bough 3 Notebooks, Divide How Much She Paid By How Many Notebooks She Bought.
12 Divided By 3 Is 4
4 Is The Answer
Hope It Helped (: