Answer:
5
Step-by-step explanation:
The height of the largest triangle = √(9 * 25) = 3 * 5 = 15
y is the square root of (25^2 + 15^2)
y = √(625 + 225)
y = √850
y = √(2 * 5*5 * 17)
y = 5 * √34
5 goes in the box.
–x + 6y = 42
Hope this answer is right!
