Answer:
The answer is B.
Step-by-step explanation:
Irrational number is a number that cannot be written in a fraction-form.
In the option above,
Option A,
[tex]9.2727 = \frac{92727}{10000} [/tex]
Option B,
[tex] \sqrt{2} = \sqrt{2} [/tex]
Option C,
[tex]5x \sqrt{9} \\ = 5x \times 3 \\ = 15x \\ = \frac{15x}{1} [/tex]
Option D,
[tex] - \frac{37}{71} = - \frac{37}{71} [/tex]
