Answer:
Option C: 4
Step-by-step explanation:
Use the Pythagorean Theorem:
[tex]a^2+b^2=c^2[/tex]
[tex]3^2+b^2=5^2[/tex]
[tex]9+b^2=25[/tex]
[tex]b^2=16[/tex]
[tex]b=4[/tex]
Therefore, the value of x is 4.
