Simplify the exspresion below 3(7.1y + 4x)

Mathematics

1 answer:

givi [52]3 years ago

8 0

Answer:

21.3y + 12x

Step-by-step explanation:

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4 divided by 2 is equal to 2. A number that is 5 times that would be 10, which is 2x5.

Not sure if it's correct, but I hope it helps :)

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Factorize:216a^4b+512ab^4

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Answer:
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More points also what is 2x3+4x6x8+9

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Answer:

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Step-by-step explanation:

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$\bf \begin{array}{cccccclllll}
\textit{something}&&\textit{varies directly to}&&\textit{something else}\\ \quad \\
\textit{something}&=&{{ \textit{some value}}}&\cdot &\textit{something else}\\ \quad \\
y&=&{{ k}}&\cdot&x
&& y={{ k }}x
\end{array}\\ \quad \\
$

and also

$\bf \begin{array}{llllll}
\textit{something}&&\textit{varies inversely to}&\textit{something else}\\ \quad \\
\textit{something}&=&\cfrac{{{\textit{some value}}}}{}&\cfrac{}{\textit{something else}}\\ \quad \\
y&=&\cfrac{{{\textit{k}}}}{}&\cfrac{}{x}
&&y=\cfrac{{{ k}}}{x}
\end{array}
$

now, we know that V varies directly to T and inversely to P simultaneously
thus $\bf V=T\cdot \cfrac{k}{P}$

so $\bf V=T\cdot \cfrac{k}{P}\qquad 
\begin{cases}
V=42\\
T=84\\
P=8
\end{cases}\implies 42=\cfrac{84k}{8}\implies 4=k
\\\\\\
V=\cfrac{4T}{P}\qquad now\quad 
\begin{cases}
V=74\\
P=10
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Step-by-step explanation:

it increased by 3 minutes everyday starting from 3, 6, and then finally 9.

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