Problem:

Which of the following are equivalent to n + 9?

 

1.

9 + n

2.

9n

3.

3 + n + 6

4.

n – 9

 

         A.  1 only

         B.   2 only

         C.   3 only

         D.  4 only

         E.   1 and 3 only

         F.   1, 2, and 3 only