To find the perimeter \( P \) of a rectangle, the correct equation to use is:
\[ P = 2(t + u) \]
where \( t \) is the length and \( u \) is the width of the rectangle.
Given:
- \( t = 17 \)
- \( u = 11 \)
You can substitute these values into the perimeter equation:
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First, calculate \( t + u \): \[ t + u = 17 + 11 = 28 \]
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Then, multiply by 2 to find the perimeter: \[ P = 2(t + u) = 2 \times 28 = 56 \]
So, the perimeter of the rectangle when \( t = 17 \) and \( u = 11 \) is \( P = 56 \).
Final Answer: The perimeter \( P \) is \( 56 \).