Please be specific with the question. There seems to be missing information.
There are no missing symbols? "5x + xsq>100" is all there is?
If it is, then the only thing you can deduce from it is...
5x + xsq > 100
x > 100 / (5+sq)
x is not ... "less than or equal to 100/(5+sq)"
Given the choices of 10, 8, 7, 9, you must be misreading something. Is this something that you can upload so I can see the file?