Answer:
6.5
Explanation:
If 6.5 < x ≤ 9.0, then x cannot be equal to 6.5, because the inequality is strict and x must be greater than 6.5. However, x can be equal to any value between 6.5 and 9.0, including 9.0, since the inequality is inclusive on the upper end. Therefore, the only value that x cannot be equal to is 6.5.