Final answer:
The expression "The difference of twice a and 5, all divided by 3" refers to a mathematical term known as a constant.
Step-by-step explanation:
In mathematical terms, a constant is a value that remains unchanged and doesn't involve any variables. It's a fixed numerical value that retains the same magnitude regardless of any variations in the variables within an expression or equation.
In the given expression, "twice a" represents 2 multiplied by the variable 'a'. Adding 5 to this product gives "the difference of twice a and 5." Dividing this difference by 3 introduces the operation of division by a constant value (3 in this case). The result of these operations is a numerical value, devoid of any variables or unknowns. This value remains constant and doesn't rely on any changing parameters.
Hence, in the context of the given expression, the term "constant" accurately describes the mathematical entity represented by the expression. It is a fixed value derived from arithmetic operations applied to specific numerical or algebraic elements within the expression but doesn't depend on any variable, maintaining a consistent value throughout its application.