Answer:
Option D. x = 5
Explanation:
Figure for the given question is not attached; please find the figure attached with the answer.
In this figure, ∠SUV ≅ ∠WUT ≅ 90°
Length of hypotenuse SV = 2x + 9
and length of hypotenuse WT = 4x - 1
Sides VU ≅ UW
If triangles SUV and TUM are congruent, by the property of (HL) Hypotenuse-Leg theorem
VU ≅ UW [Given]
Hypotenuse SV ≅ TW
2x + 9 = 4x - 1
4x - 2x = 9 + 1
2x = 10
x =

x = 5
Therefore, option D. x = 5 is the answer.