Looks good to me. An easy way to check these yourself is to observe that :
(1) when you plug in 2.5 for X, you get 6. So the number's correct, it's just a question of whether you need answers above or below it.
(2) Try plugging in an easy to use number below 2.5, like 0. If the inequality holds, you should be okay. In this case 1 < 6, so it holds.
(3) You can also then try plugging in something larger than 2.5 to make sure the inequality still holds. Using X=3, we get 7, which is NOT less than 6, so it would appear good that we stuck to numbers less than 2.5.
I hope this helps.
- Steve J