Answer:
B: 5
Step-by-step explanation:
The pythagorean theorem says a^2 + b^2 = c^2, which when reversed, can equal c^2 - a^2 = b^2
Here, 13 is c, 12 is a, and x is b
13^2 = 169
12^2 = 144
169 - 144 = 25
The square root of 25 is 5, leading our answer to be b.
