Answer:
Amy bought 4 pounds of coffee.
Explanation:
To begin, subtract what she has left, $55.44, from what she began with with, $90. That equation looks like: 90 - 55.44 = 34.56
Now divide $34.56 by the cost of each pound of coffee, $8.64. That equation looks like: 34.56 ÷ 8.64 = 4
So your answer is 4. Amy bought 4 pounds of coffee.