
Concept explainers
To find whether the number is prime or composite.

Answer to Problem 7E
The number is composite.
Explanation of Solution
Given Information:
Number 9
Formula used: To check if the numbers is prime or composite by finding its factors. If its factors are more than 2(except 1 and the number itself), then the number is composite else prime.
Calculation:
To determine if 9 is a prime number or a composite number, simply look at the factors for 9.
If the factors of 9 are only 9 and 1, then 9 is a prime number. Otherwise, 9 is a composite number.
To explain better, if 9 is only divisible by 1 and 9, then it is a prime number, and if 9 is divisible by more than 9 and 1, then it is a composite number.
The factors of 9 are as follows:
1, 3, 9
Therefore, since 9 is divisible by more than one and itself, the number is composite.
Chapter 4 Solutions
ELEMENTARY+INTERMEDIATE ALGEBRA
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