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Evaluate the expression 4x-1 when x=5.
A) 15
B) 19
C) 5
D) 16

1 Answer

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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).

User Gernot Ullrich
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