The sentence "Nine is more than a number" can be represented by the inequality 9 ≥ n. true or false

It's a bit of both, actually.

9 ≥ n actually states that the quantity 9 is either greater than or equal to the value of the variable n.

Depending on how exact you mean, it's true and false, because 9 ≥ n technically includes 9 is more than a number, but it also could be 9 is equal to a number.

I'd say the answer is probably true, but it's a bit confusing.