is each expression a polynomial?

drag and drop each expression to the correct box.

is a polynomial

is not a polynomial

x^2
—— + 1
7

-2x^3+2x+4

x^-3 + 4x

6x - x^3 + 4x^2

Step-by-step explanation:

A polynomial is the sum or difference of one or more monomials.  A monomial is a constant, a variable, or the product of constants and variables.  It does not include negative exponents.

The first choice is a polynomial because the only terms are variables with positive exponents and constants.

The second choice is a polynomial because the only terms are variables with positive exponents and constants.

The third choice is not a polynomial because the first term has a negative exponent.

The fourth choice is a polynomial because the only terms are variables with positive exponents and constants.

Hi there!

Accr'ding to question :-
Karl rides his bicycle 120 feet in 10 seconds.

∵ 10 seconds = 120 feet

Multiplying 6 both th' sides :-

=> 6 × 10 seconds = 6 × 120 feet

=> 60 seconds = 720 feet.

∴ Karl rides 720 feet in a minute

• In a minute, there are 60 seconds

Hence,
Option [ C. ] - 720 feet is Correct.

~ Hope it helps!