4 years ago

The height of a standard doorway in a home is 80 inches. What is the metric equivalent in centimeters?

Mathematics

1 answer:

poizon [28]4 years ago

8 0

The metric equivalent in centimeters is 203.2

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How do I solve the y= x/11- 11x d/dx ( x/11- 11/x)

ArbitrLikvidat [17]

$\bf \cfrac{d}{dx}\left[ \cfrac{x}{11}-\cfrac{11}{x} \right]\implies 
\cfrac{d}{dx}\left[ \cfrac{x}{11} \right]-\cfrac{d}{dx}\left[\cfrac{11}{x} \right]
\\\\\\
\cfrac{1}{11}\cdot \cfrac{d}{dx}\left[x \right]-11\cdot \cfrac{d}{dx}\left[\cfrac{1}{x} \right]
\implies 
\cfrac{1}{11}\cdot 1~~-~~11\cdot \cfrac{d}{dx}[x^{-1}]
\\\\\\
\cfrac{1}{11}~~-~~11\cdot -x^{-2}\implies \cfrac{1}{11}+\cfrac{11}{x^2}
\implies 
\cfrac{x^2+121}{11x^2}$