Answer:
x= 11.25, y=5.29
Explanation:
Since I can only guess what subject this is off the picture, I've concluded by dividing 90 with the bigger triangle's side will give you your hidden answer. For example, 90/15 = 6 so I'd presume the rest are like that. 90/17 = 5.29, 90/8 = 11.25