Given f(x)=x^2−5x and g(x)=2x+1, find (f+g)(−3).

Mathematics

1 answer:

mafiozo [28]2 years ago

4 0

Answer:

Use the given functions to set up and simplify

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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
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\end{array}\\ \quad \\
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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 \\
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\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\\
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P=8
\end{cases}\implies 42=\cfrac{84k}{8}\implies 4=k
\\\\\\
V=\cfrac{4T}{P}\qquad now\quad 
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Help asap please.. Brainliest to correct!

vovikov84 [41]

Answer:

Step-by-step explanation:

x + 6 I x³ + 2x² - 10x + 84 I x² - 4x + 14

x³ + 6x²

- -

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-4x² - 24x

+ +

14x + 84

- -

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