It is 9 because you have a 30,60,90 triangle, and then you can use pythagorean theorem.
I would think this is many solutions, the reason is because, there is no specific answer (y) so, x could be anything because it would have to equal to y, which could also be anything! I hope im right! Sorry if im wrong!
KBPS is larger than MBPS.
1 KBPS = 0.001 MBPS
