Which of the following applies to expressions in quantitative analysis?

In quantitative analysis, expressions are mathematical constructs that typically consist of numbers, variables, and operations such as addition, subtraction, multiplication, and division. These components allow for the representation of relationships and patterns within data. Expressions may not necessarily have equality or inequality signs; those symbols are usually used in equations or inequalities rather than expressions. Furthermore, expressions can take various forms, including linear and non-linear, depending on how the variables relate to one another. Thus, the definition that encompasses the fundamental structure of expressions accurately is that they consist of numbers, variables, and operations, confirming that this choice is the correct understanding of expressions in the context of quantitative analysis.