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GarryVolchara [31]
3 years ago
12

The length of a rectangle is twice its width. The perimeter of the rectangle is 36 cm. Calculate the area of the rectangle

Mathematics
1 answer:
Pie3 years ago
6 0
Length = 2(width)
perimeter = 36 cm

using variables where x = width and y = length

Perimeter = 2x + 2y = 36 cm
y = 2x

solving for length 2x + 2(2x) = 36 cm
                             2x + 4x = 36 cm
                             6x = 36 cm
                               x = 6 cm
                              
                          so y = 2(6 cm) = 12 cm

area of rectangle = 12 cm * 6 cm = 72 cm^2
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The resulting matrix of the row operation is given as follows:

R = \left[\begin{array}{ccc}7&4.5&-6\\-6&-3&12\end{array}\right]

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