Question

Combine like terms.

4a + b + a






A.


4a + 4b




B.


5a + 5b




C.


5a + b




D.


4ab

Answer 1

`4a+b+a=5a+b`

Answer 2

To combine these terms you would add up the a's and b's.
4a+b+a is the same as 4a+a+b. Anything without a constant in front has a value of 1. You have 4a's and you need to add another a. That equals 5a's. The b is left alone since you can only add like variables.
The answer would be C) 5a +b