A is 23 and the answer to b is 77
Answer: The correct answer is the second choice: "When any two polynomials are added, the result is always a polynomial."
When a set of numbers is "closed" under an operation, it means that the resulting output answer is the same type as the input.
For example, if you add 2x + 9 and 3x + 12, you get 5x + 21.
You started with 2 polynomials and you ended with a polynomial.
Per kilometer is 14.22
32 divided 14 2/9
7a+b-4a-2b
=3a-b
Add the coefficients of the ones with the same letter.
