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Points] DETAILS MY NOTES TGEIALG6 2.5 .055 . The length of a picture is 6.75 inches shorter than twice the width. If the perimeter of the picture is 118.5 inches, find its dimension width length SUBMIT ANSWER

Ask by Erickson Barnett. in the United States
Mar 14,2025

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Tutor-Verified Answer

Answer

The picture is 22 inches wide and 37.25 inches long.

Solution

Let the width be \( w \) and the length be \( l \). 1. The length is 6.75 inches shorter than twice the width, so: \[ l = 2w - 6.75 \] 2. The perimeter of the rectangle is given by: \[ P = 2(l + w) = 118.5 \] Dividing both sides by 2, we obtain: \[ l + w = 59.25 \] 3. Substitute the expression for \( l \) from step 1 into the perimeter equation: \[ (2w - 6.75) + w = 59.25 \] Combine like terms: \[ 3w - 6.75 = 59.25 \] 4. Solve for \( w \) by adding 6.75 to both sides: \[ 3w = 59.25 + 6.75 = 66 \] Then, divide both sides by 3: \[ w = \frac{66}{3} = 22 \] 5. Now, substitute \( w = 22 \) back into the expression for \( l \): \[ l = 2(22) - 6.75 = 44 - 6.75 = 37.25 \] The dimensions of the picture are: - Width: \( 22 \) inches - Length: \( 37.25 \) inches

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Bonus Knowledge

Let’s break it down! First, let’s define the variables: let the width be \( w \) inches. According to the problem, the length can be expressed as \( 2w - 6.75 \) inches. The formula for the perimeter of a rectangle is \( P = 2 \times (length + width) \). Setting it equal to 118.5 inches gives us: \[ 2(2w - 6.75 + w) = 118.5 \] Simplifying that: \[ 2(3w - 6.75) = 118.5 \] \[ 6w - 13.5 = 118.5 \] \[ 6w = 132 \] \[ w = 22 \] inches (width) Now plug that back into the length formula: \[ length = 2(22) - 6.75 = 44 - 6.75 = 37.25 \] inches. So, the width is 22 inches and the length is 37.25 inches! Great job working through that; keep practicing and those algebraic skills will be sharper than ever!

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