Final Answer:
The value of the expression 4x - 1 when x = 5 is (Option D) 16.
Step-by-step explanation:
To evaluate the expression 4x - 1 when x = 5, substitute x with 5 in the expression:
4 × 5 - 1 = 20 - 1 = 16.
Therefore, the correct answer is D) 16.
Understanding how to substitute a specific value into an algebraic expression is fundamental in mathematics. In this case, plugging in x = 5 into 4x - 1 allows us to find the numerical value of the expression at that particular point.
In summary, evaluating expressions involves replacing variables with given values. For 4x - 1 with x = 5, the result is 16, leading to the correct answer D) 16. This process of substitution is a basic concept that forms the foundation for more advanced algebraic manipulations and problem-solving techniques (Option D).