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19 June, 20:51

Which number is irrational?

A. square root of 5

B. 0.777 ...

C. 0.454545 ...

D. 0.3

+5
Answers (2)
  1. 19 June, 20:56
    0
    irrational numbers are number that can't be written in a/b form where a and b are integers and b≠0

    if it repeats, it can be written as a fraction

    if it terminates, it can also be written as a fraction

    if you have a square root that doesn't simplify nicely, we assume it to be irrational

    so

    A. 0.454545=45/99

    B. irrational

    C. 7/9

    D. 3/10
  2. 19 June, 21:11
    0
    A

    Step-by-step explanation:

    The square root of 5 is irrational because it cannot be expressed as a fraction.

    Meanwhile, all 3 other answer choices are not irrational because they can be put into fraction form.
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