In your notebook, set up the following addition using a vertical format and find the sum of the given polynomials. 2mn + 4n 2 and 5m 2 - 7mn 9m2 + 9mn - 4n2 5m2 - 14mn - 4n2 5m2 - 5mn + 4n2 5m2 + 5mn - 4n2

2mn + 4n² + 5m² - 7mn = 4n² + (2mn - 7mn) + 5m² = 4n² - 5mn + 5m²

C

C is correct.

Step-by-step explanation:

Set up the following addition using a vertical format.

Vertical Format: Write each polynomial below their like term and then combine it

First expression:

2nd Expression:

Now, we will add vertically. If the variable part of the term is same then it would be like term.

Vertical Format:

We wrote the like term below their corresponding.

Now, combine their coefficient and write variable as same.

We can rearrange the term according to options.

Hence, Th addition of two expression is

add all the numbers and check the ones place.

the answer is 486. as the ones place is more than 4, the estimation will be the next 10 ie, 490

i have no clue at all sorry

step-by-step explanation: