Question

Which number is an irrational number?
A) 5.499
B) -√9
C) 117
D) -10

Answer 1

The only number that is an irrational number is B) -√9.

Step-by-step explanation:

An irrational number is a number that cannot be written as a fraction or a ratio of two integers. It is a non-repeating, non-terminating decimal. Out of the given options, the only number that is an irrational number is B) -√9.