Answer:
1
Step-by-step explanation:
Let's start by prime factorizing (finding the prime factors) of 16 and 21:


We can see that they DO NOT have any common factors, meaning that their greatest common factor is 1.
Answer: Should be 163
Step-by-step explanation: Substitute the value of the variable into the expression and simplify.
163
Answer:
Whats the other options
Step-by-step explanation:
<span>-4,4,-6,6 is your answer </span>