Answer:
[see below]
Step-by-step explanation:

Answer:
The answer is c because there is not suppose to be a negative number
Step-by-step explanation:
Answer:
2800
Step-by-step explanation:
round 278 to 280
then round 11 to 10
then times the 2 answers together
Answer:
Yes
Step-by-step explanation:
Since we are adding two polynomials
The sum will also be polynomial