Answer:
A.
Step-by-step explanation:
The answer is A.
Answer:
Step-by-step explanation:
4 I think not sure
Answer:
1, 11x + 3y + 15z
2, 3x + 12y + -5z
Step-by-step explanation:
all you need to do is combined the like terms and make sure the signs (<em>positive and negative signs</em>) are right