The Clarks are buying a decorative border for 2 rooms that have just been wallpapered. One room is square and measures 13 ft
on each side. The other room is rectangular and is 12 ft long by
10ft wide. They buy 74 ft of border. Is this correct? Explain.

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Ответ:

GgRed

10.01.2023

Mathematics

y = -16

Step-by-step explanation:

Given that,

y varies directly with x. Mathematically, we can write it as follows :

$y\propto x$

y=kx

Where

k is constant

Put y = 12 and x = -3 to find k. So,

$k=\dfrac{y}{x}\\\\k=\dfrac{12}{-3}\\\\k=-4$

Now put k = -4 and x = 4. So,

$y=-4\times 4\\\\=-16$

So, the required value of y is equal to -16.

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The Clarks are buying a decorative border for 2 rooms that have just been wallpapered. One room is square and measures 13 ft on each side. The other room is rectangular and is 12 ft long by 10ft wide. They buy 74 ft of border. Is this correct? Explain.