The answer is 21 + 4x.
You find this answer by adding up all the sides.
9+12+4x= 21+4x ... you don't add 4x because it has a variable that we do not know of the value.
10. GCF is 3
11. GCF is 4
12. GCF is 16
13. That the numbers are prime
:)
Answer:
Some integers are irrational
Step-by-step explanation:
An integer must be a whole number so it will always be rational.
