The equation that best represents the set-up is (d) 9^2 + x^2 = 16^2
The complete question is in the image
The value of x is calculated using the following Pythagoras theorem
16^2 = x^2 + 9^2
Rewrite as:
9^2 + x^2 = 16^2
Hence, the equation that best represents the set-up is (d) 9^2 + x^2 = 16^2
Read more about right triangles at:
https://brainly.com/question/2437195
#SPJ1