12.
Add like terms from both trinomials:



Combine these terms to get a new trinomial as your answer:

13.
Subtract like terms from both trinomials (note that subtracting a negative is the same as adding it as a positive):



0 can be left out of the answer.
Combine these terms to get a binomial as your answer:
Answer:
9 cows and 1 chicken ( plz help me)
Step-by-step explanation:
You need to find a number that all three of those numbers go into. They all go into 60. Then, divide 60 by three because there are three items. 60 divided by 3 is 20, which is the answer.
Answer:
3000
Step-by-step explanation:
Answer:
that is an addition sign the correct answer is B
Step-by-step explanation: