math
posted by Anonymous .
what is the sum of 3a + b + a + b?
1)3a+2b
2)4a+2b
3)a3+b2
4)4a + b
5)6ab

suppose I had
3 apples plus 1 banana plus another apple plus another banana.
I think I would have 4 apples and 2 bananas, wouldn't I