Final answer:
The polynomial with a leading coefficient of -4 and is a sixth-degree monomial is -4x^6.
Step-by-step explanation:
The expression that represents the polynomial with a leading coefficient of -4 and is a sixth-degree monomial is Option A) -4x^6.
A polynomial is an algebraic expression consisting of terms with variables raised to different powers. The degree of a polynomial is the highest exponent of its variable term.
In this case, the leading coefficient is -4, which means that the coefficient of the term with the highest degree is -4. Since the polynomial is a monomial of degree 6, it means that the variable term raised to the sixth power is the only term in the polynomial.
Therefore, the correct expression is -4x^6.