Answer:
C:-4x+2
Step-by-step Explanation:

The answer is 3/6 or 1/2. If it is of a hour it's 30 minutes. <span />
Example :
20 + 30.....GCF = 10
10(2 + 3)
The GCF of the number now is 1....because u have basically already factored the GCF out.....leaving only 1 as a factor now
here's another one...
3 + 9...GCF = 3
3(1 + 3)
so the GCF now is 1