CPM Homework Help : INT2 Problem 7-12

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7-12.

Identify each sum or product as a rational number or an irrational number.

$6+\sqrt{5}$
Hint (a):
A rational number is a number that can be written as a fraction of integers. Can a square root be written as a fraction of integers?
Answer (a):
Irrational

$\frac{2}{3}+\frac{3}{4}$
Answer (b):
Rational

$\frac{3}{5}·\sqrt{11}$

$\sqrt{9}\cdot\sqrt [ 3 ] { 9 }$

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