Answer:
The common factor is 1.
Step-by-step explanation
The common factor of 1 and 2 is 1 since 1x2=1.
1-b cuz its describing numbers
2-A-prmation again
3-7C5 = 7!/(5!2!) = 7*6/2 = 21 so its B
4-792
5-d
hoped i helped
Answer: 1
Step-by-step explanation: if a=2 then it would be 2 x 2 which is 4 and the minus 3 which is 1
