Which of these numbers are irrational?

Answer:
B. [tex]\sqrt{5}[/tex]
Step-by-step explanation:
Irrational numbers cannot be expressed as simple fractions.
3/5 is a fraction.
[tex]\sqrt{5}[/tex] cannot be expressed as a fraction.
-3.5 can be written as -7/2.
3.555... can be written as 32/9.