4. what are the values of x and y?
a) x=9/4, y=3/4
b) x=9/4, y=15/4
c) x=15/4, y=5/4
d) x=3/4, y=15/4

you

All of the triangles are similar.

Ratio of short to long sides:
.. x/3 = 3/4
.. x = 9/4

Ratio of hypotenuse to long sides:
.. y/3 = 5/4
.. y = 15/4

The 2nd selection is appropriate.

Yes of course i will indeed you with your problem.