Answer:6
Explanation:
The expression "f-9" can be interpreted in different ways depending on the context. 1. If "f" represents a variable or function, and you are asked to evaluate "f-9", it means you need to subtract 9 from the value of "f". For example, if f = 15, then f-9 would be 15-9 = 6. 2. If "f" is a specific function or formula, and you are asked to simplify "f-9", it means you need to simplify the expression "f-9" as much as possible. Without further information about the specific function or formula, it is difficult to provide a specific answer. However, you can follow general rules of simplifying expressions, such as combining like terms or applying mathematical operations. 3. If "f" is a placeholder for a specific numerical value, and you are asked to evaluate "f-9", you need to substitute the value of "f" into the expression and then subtract 9. For example, if f = 7, then f-9 would be 7-9 = -2. In summary, the meaning of "f-9" depends on the context and how "f" is defined. It could represent subtraction of 9 from a variable or function, simplification of an expression involving "f" and 9, or evaluation of an expression where "f" represents a specific numerical value.