Final answer:
Formulas start with an equal sign, can return a single value, and may contain constants and variables. Functions are widely used in spreadsheet software and are essential for performing calculations.
Step-by-step explanation:
Understanding formulas and functions is crucial in mathematics, particularly when working with spreadsheet software. The statements given in the question provide insights into the nature of formulas and functions:
- A) Formulas always begin with an equal sign (=): This statement is true. In spreadsheet software as well as in mathematical notation, a formula usually begins with an equal sign, indicating that what follows is a calculation or operation to be performed.
- B) Functions return a single value: This statement is generally true. A function, whether in mathematics or spreadsheet software, accepts inputs and produces one output or result.
- C) Formulas can contain both constants and variables: This statement is true. Formulas can certainly include both constants (fixed numbers) and variables (symbols representing numbers that can change).
- D) Functions are not used in spreadsheet software: This statement is false. Functions are a fundamental part of spreadsheet software, used extensively to perform a variety of calculations and data manipulations.
Thus, the accurate descriptions of formulas and functions are that they begin with an equal sign, can return a single value, and can contain both constants and variables. Functions are indeed used in spreadsheet software.