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reaperqueen21
29.01.2020 •
Mathematics
Arectangle’s width is one-fourth of its length. its area is 9 square units. the equation l(1/4l) = 9 can be used to find l, the length of the rectangle.
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Ответ:
I see no actual question, but I'm assuming that you want to find the dimensions of the rectangle.
In general, the area of a rectangle with width
and length
is
In this case, we know that the width is one-fourth of its length, which means![w = \frac{1}{4}l](/tpl/images/0479/7187/1ef99.png)
If we plug this expression for w in the formula for the area, we get
We also know that the area is 9 squared units, so we have
If we multiply both sides by 4, we get
Consider the square root of both sides (we only accept the positive solution, since a negative length would make no sense:
So, the length is 6, and the width is one-fourth of 6, i.e.
Ответ:
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