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Aleks04 [339]
2 years ago
8

A(n) ______________________ is a letter used as a placeholder for an unknown value.

Mathematics
1 answer:
Alexeev081 [22]2 years ago
3 0
The answer is variable, he’s correct.

Variables are letters used to substitute unknown values, as the question stated.
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Twice the difference of a number and 8 equals 2
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<em>Answer: h = 120 ft;    w = 80 ft </em>

<em></em>

<em>A = 9600 ft^2</em>

<em />

<em>Step-by-step explanation: Let h and w be the dimensions of the playground. The area is given by:</em>

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<em>A = h*w   (eq1)</em>

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<em>Solving for w:</em>

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<em>w = L - 2/3*h = 480 - 2/3*h   (eq3)  Replacing this into the area eq:</em>

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<em>We derive this and equal zero to find its maximum:</em>

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<em>   Solving for h:</em>

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<em>h = 120 ft.  Replacing this into eq3:</em>

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<em>w = 80ft</em>

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<em>Therefore the maximum area is:</em>

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<em>A = 9600 ft^2</em>

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