which of the following is true about -9 ?
it is a whole number but not an integer
it is an integer but not a rational number
it is an integer but not a whole number
it is both a whole number and a integer
It is both a whole number and an integer.
The statement that is true about -9 is that it is both a whole number and an integer.
To determine which statement is true about -9, let's break down the terms and their definitions.
1. Whole Number: Whole numbers include all positive numbers starting from zero (0) and their corresponding negative numbers. Since -9 is a negative number, it is not a whole number.
2. Integer: Integers include all positive numbers, their corresponding negative numbers, and zero (0). -9 falls under the category of integers.
3. Rational Number: Rational numbers are numbers that can be expressed as a quotient or a fraction of two integers, where the denominator is not zero. Since -9 can be expressed as -9/1, it is a rational number.
Based on the definitions, the correct statement is:
-9 is an integer but not a whole number.