Okay so first we see the left half is in between "| |" and that means absolute value. That means whatever number is between those lines, you make positive. Now we just plug in the numbers from the choices and see which ones apply.
|27 - 7.5| ≤ 17
|19.5| ≤ 17
19.5 ≤ 17
False. Choice A is not the answer.
|20 - 7.5| ≤ 17
|12.5| ≤ 17
12.5 ≤ 17
True. Choice B is one of the answers.
|(-9) - 7.5| ≤ 17
|-16.5| ≤ 17
16.5 ≤ 17
True. Choice C is also an answer.
The two that apply are B and C.
Hope that helps!