Answer:
B.

Step-by-step explanation:
Explanation:

Answer:
3x-4y
Step-by-step explanation:
Answer:
the fourth number would be 9
Step-by-step explanation:
the last number would be 9 because if you know the mean is 7 and there are 4 numbers then you multiply 4*7 then subtract 5, 7 and 7 to get 9
6 is a factor and 36 is neither and 48 is a multiple