Final answer:
The GCF of 30m+12n is 6.
Step-by-step explanation:
The GCF (Greatest Common Factor) of 30m+12n can be found by factoring out the common factors of both terms.
First, we can factor out 6, which is the greatest common factor of 30 and 12:
30m + 12n = 6(5m + 2n)
Therefore, the GCF of 30m+12n is 6.