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ERGENTWhich expression represents a rational number?

ERGENTWhich expression represents a rational number?-example-1

1 Answer

4 votes

Answer:


(2)/(7)+√(121)

Explanation:

Rational Numbers

Rational numbers are those that can be expressed as the fraction


(a)/(b)

where a and b are integers and b≠0.

Examples of rational numbers are:

4/3, -100/34, 9, -5, 0

Note the last three numbers are integers but they also can be called rationals because they can be written as 9/1, -5/1, 0/1.

Irrationals are those numbers that cannot be expressed as fractions, i.e. they are not rationals.

Examples of irrational numbers are:


2\pi,\ √(5), \sin 4^\circ

Analyzing the available options:


√(18) is not a rational number because the value of the root is not exact

π and
√(11) are not rational numbers either, but
√(121)=11.

Thus the only rational number from the list is


\mathbf{(2)/(7)+√(121)}

User Gary Kindel
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