Answer:
17
Step-by-step explanation:
This is pretty much Pythagorean theorem.
The equation is the square root of side a plus side b. √(x+Y)=Z
So side b would be 8 and side a would be 15.
Add these up it would be
64+225= 289
and the square root of the is 17.
Hope this helps and have a nice day :)
