Which question are you talking about 1 or 2?
Answer:
O. All Real Numbers
Step-by-step explanation:
4(a+3)=12+4a
1) Distribute 4(a+3):
4a+12=12+4a
These values are exactly the same, meaning all real numbers will work!
Answer:
$31.50
Step-by-step explanation:
30% of 45 is 13.5
45-13.5=31.5
Answer: 12
Step-by-step explanation: 3 times 4=12
1. Polynomials are closed under the operations of addition and substraction mean that:
If we add two polynomials, the result is still a polynomial (so still in the set of polynomials)
Also, If we subtract 2 polynomials, the result is a polynomial.
2. Example: given the polynomials :

and

Addition example:


Subtraction example:

=

=

So both M(x)+N(x) and N(x)-M(x) are polynomials