Which of the following shows that polynomials are closed under subtraction when two polynomials, (4x2 − 8x − 7) − (3x2 − 5x + 16), are subtracted?

x2 − 3x − 23; will be a polynomial
x2 − 3x − 23; may or may not be a polynomial
x2 − 13x + 9; will be a polynomial
x2 − 13x + 9; may or may not be a polynomial

; will be a polynomial

Step-by-step explanation:

Given:

Two polynomials has to be subtracted

By Definition of polynomial which states:

"A polynomial is an algebraic expression with a finite number of terms and are termed in the form "axn" where "a" is a real number, "x" means to multiply, and "n" is a non-negative integer."

; will be a polynomial

4+n=5

step-by-step explanation:

this is because the four is four hours and the n represents the 1 extra hour over the weekend.

b= i'm srry i don't know that one.

4+n=5 n=1 because if vernon plays 5 hours a week then 4+1=5 hours.

hope this : )