27.64x3 estimate product

Mathematics

2 answers:

ki77a [65]2 years ago

6 0

If you round up the 27.64 to 28 and then multiply it bye 3 it eaquals 84

ArbitrLikvidat [17]2 years ago

3 0

82.92 which is about 83

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Answer:

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2 years ago

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igor_vitrenko [27]

$\bf \qquad \qquad \textit{double proportional variation}
\\\\
\begin{array}{llll}
\textit{\underline{y} varies directly with \underline{x}}\\
\textit{and inversely with \underline{z}}
\end{array}\implies y=\cfrac{kx}{z}\impliedby 
\begin{array}{llll}
k=constant\ of\\
\qquad variation
\end{array}\\\\
-------------------------------\\\\$

$\bf \textit{\underline{y} varies directly as (x+3) and inversely as (x-3)}\implies y=\cfrac{k(x+3)}{x-3}
\\\\\\
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\begin{cases}
y=21\\
x=4
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\\\\\\
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3 years ago