Give a minute I will find answer
Answer:
?=9
Step-by-step explanation:
We have a special right triangle, the 45-45-90 triangle.
In a 45-45-90 triangle, the side lengths are x, and the hypotenuse is x√2.
Since we know that the side length is 9, this means that:

The ? is 9.
Answer:
the mean = 9, and the mean deviation = 3.75
Hope this helps! :)
2+2=4
a^2+b^2=c^2
15^2-4^2
=225-16
=209