Answer:
5 pounds / Make sure to read the explanation so you know how to solve it
Explanation:
First thing to do is:
Subtract 90 by 47.10 to find the amount of money she spent
She spent $42.90 on coffee and we know that it costs $8.58 per pound so that means that we should divide 42.90 by the cost per pound:
She bought 5 pounds of coffee
Hope I helped :]