Answer:
The best inequality that represents the possible weight of the blue block is "0 ≤ b ≤ 7".
Explanation:
Let's call the weight of the blue block "b" in ounces. The total weight of both blocks is at most 16 ounces, so we can write the inequality:
9 + b ≤ 16
To solve for b, we can subtract 9 from both sides:
b ≤ 7
So the possible weight of the blue block is at most 7 ounces. We can write this as the inequality:
0 ≤ b ≤ 7
Therefore, the best inequality that represents the possible weight of the blue block is "0 ≤ b ≤ 7".