For number 3 add all the numbers and divide how numbers you have
No I do not know how to do this
There are only 2 perfect cubes in between 1000 and 2000.
11^3 = 1331
12^3 = 1728
I think the answer is A. Cause your supposed to subtract so 7n-4n=3n, and 3-2=1 :) I hope this helps
