Q: Is 7.9 irrational

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No.

Approximately 8.8 repeating. While true, the answer is misleading in the sense that a repeating decimal implies a rational number whereas sqrt(79) is irrational. Sqrt(79) = 8.888194..

yes

Yes. The sum of two irrational numbers can be rational, or irrational.

It is always irrational.

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No.

Approximately 8.8 repeating. While true, the answer is misleading in the sense that a repeating decimal implies a rational number whereas sqrt(79) is irrational. Sqrt(79) = 8.888194..

Irrational. Irrational. Irrational. Irrational.

15.6 is rational. If a number can be expressed in the form of one_integer/another_integer it is a rational number. 15.6 = 153/5 = 79/5 Thus 15.6 is a rational number

It is irrational.

Rational

Such a sum is always irrational.

If it says "negative irrational", then obviously it is irrational.

No

The square root of 94 is an irrational number

irrational

yes