Answer:
angle Y is not the largest angle
Explanation:
In a triangle, the longest side is opposite the largest angle. In a right triangle, the right angle is the largest angle.
__
analysis
The side labeled 5x+1 is opposite angle Y. The side labeled 5x+2 will always be longer, meaning that angle Y is never the largest angle in the triangle.
Since angle Y is not the largest, it cannot be a right angle.