The expressions are not polynomials are 4y-2 and 3x + 8 since their highest degrees is 1
The standard polynomial expression is given as:
- [tex]y = a_nx^{n-1} + a_nx^{n-2}+ ...[/tex]
- Note that the lowest degree of polynomial functions is 2. Any function with a degree less than 1 is a linear function.
- From the given options, the expressions are not polynomials are 4y-2 and 3x + 8 since their highest degrees is 1
Learn more on polynomials here: https://brainly.com/question/2833285