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-- Any number that you can completely write down using digits, and a decimal point

or fraction bar if needed, is rational.

-- A rational number is defined as one that can be written as a fraction using whole numbers.

-19 can be written as the fraction -19/1 .

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-- Any number that you can completely write down using digits is a rational number.

-- A rational number is one that can be written as the ratio of two whole numbers.

1.9 is the ratio of 19 and 10.

Yes.

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yes

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no

Q: Is -19 a rational number

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No. 19 is a prime number, and all prime numbers have irrational roots.

rational

It is a rational number. It can be written as a fraction.

9.0 is a rational number

It is a rational number, as it can be written as a fraction.

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No because 19 is a whole number which means that it is a rational number

It is a rational number because it can be expressed as a fraction in the form of -19/1

Yes 13/19 is rational because any number that can be expressed as a fraction is a rational number

It is a whole number so it is rational.

No. √19 is an irrational number.

Yes - the proper fraction 7/19 is a rational number.

No.

-19 is a rational number, since it can be expressed in fraction form (-19/1).

It is a whole number so it is rational.

1.2667

"negative 49 over 19" is the ratio of -49 to 19. That's rational.

The number 19, like all integers, is a rational number. Only certain types of decimal expansions can be irrational.