Evaluate the expression for r = 4.
Understand the Problem
The question is asking us to evaluate the mathematical expression 4r by substituting r with the value 4.
Answer
The answer is \( 16 \).
Answer for screen readers
The final answer is ( 16 ).
Steps to Solve
- Substitute the value of r
We start by replacing ( r ) in the expression ( 4r ) with the value 4.
- Perform the multiplication
This gives us:
$$ 4r = 4 \times 4 $$
- Calculate the result
Now we can calculate ( 4 \times 4 ):
$$ 4 \times 4 = 16 $$
The final answer is ( 16 ).
More Information
The expression ( 4r ) represents a linear relationship where the output is four times the value of ( r ). When you replace ( r ) with 4, you're effectively doubling the base value.
Tips
- Forgetting to substitute the value of ( r ) into the expression.
- Incorrectly performing the multiplication (e.g., calculating ( 4 \times 3 ) instead of ( 4 \times 4 )).
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