Answer:
The third option, a rational number
like 1/5 + 2.5 is still rational (but neither irrational nor whole/an integer)
it would be 0.2 + 2.5 = 2.7 btw
or
1/5 + 5/2
= 2/10 + 25/10
= 27/10
The answer would be, overlapping.
If you want me to solve for "Y" then, the answer will be,

ir if you want me to solve for "X" instead then the answer will be,

X2=9 has only one solution, which is 4.5
Step-by-step explanation:
the answer to your question is
16/9