List 4 reasons why an expression would not be considered a monomial.

A monomial can also be a variable, like “m” or “b”. It can also be a combination of these, like 98b or 78xyz. It cannot have a fractional or negative exponent. These are not monomials: 45x+3, 10 - 2a, or 67a - 19b + c.

Step-by-step explanation:

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A monomial is an expression in which variables and constants may stand alone or be multiplied. A monomial cannot have a variable in the denominator.

Step-by-step explanation: