Respuesta :

Using the Pythagorean Theorem, which is a^2 + b^2 = c^2, so it would be x^2 + 4^2 = 9^2
And then that would be:
x^2 + 16 = 81
So then by combining like terms:
x^2 = 65
So x = square root of 65.
Brainliest, thanks. :)
RELAXING NOICE
Relax