7 plus twice a number.
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The expression for the total area of the wall is 10x.
The area of each section is 2x.
<h3>How to find the area of a rectangle?</h3>The wall is 10 feet tall, but its length is unknown.
The whole wall is rectangular.
Therefore,'
area of a rectangle = lw
where
- l = length
- w = width
Therefore, the expression for the total area of the wall is as follows;
area = 10x
The area of each section can be found by dividing the length of the whole wall by 5 and multiplying by 10.
Therefore,
area of each section = x / 5 × 10
area of each section = 10 / 5 x
area of each section = 2x
learn more on area here: brainly.com/question/20424562
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