Which of the following are polynomial

The correct options are C and D.

Step-by-step explanation:

A polynomial expression is an expression where the exponents are whole numbers:

(Where n >= 0)

So, looking at the options, we have:

A. The first term has a negative exponent in x, so it's not a polynomial.

B. The third term has a square root, so it's not a polynomial.

C. This expression is a polynomial.

D. This expression is a polynomial.

E. The third term has x in the denominator, so it's not a polynomial.

Therefore the correct options are C and D.

answer: idk

step-by-step explanation:

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.