The inequality for this problem would be 10.99c + 8.89b ≤ 25.
To find this, we need to know that for every pound of cashews (c) we have to pay 10.99. That's how we find the first term. Similar for the second in which we charge 8.89 for blueberries (b).
Then when we add these together, we know that they must not be greater than 25. So we can express it with a ≤.