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3 years ago

Solve for r: 3x+r/2=14

1 answer:

5 0

3x=28-r

Steps:
1. remove the division
a. Multiply the division by 2 to make a zero, which you can now remove.
b. Multiply the answer by 2 also, to make 28.
c. You now have this equation: 3x+r=28
2. remove the number stuck to x by multiplication
a. divide 3x by 3 to make x.
b. divide 28 by 3 to make 9 and one third.
b. You now have this equation: x+r=9
$\frac{1}{3}$

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$\bf \qquad \qquad \textit{direct proportional variation}\\\\
\textit{\underline{y} varies directly with \underline{x}}\qquad \qquad y=kx\impliedby 
\begin{array}{llll}
k=constant\ of\\
\qquad variation
\end{array}\\\\
-------------------------------\\\\
\begin{array}{llll}
\stackrel{frequency}{f}\textit{ of a vibrating string varies directly}\\
\qquad \qquad \textit{with the square root of the tension }\stackrel{tension}{t}
\end{array}$

$\bf f=k\sqrt{t}\quad \textit{we also know that }
\begin{cases}
f=300\\
t=8
\end{cases}\implies 300=k\sqrt{8}
\\\\\\
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\\\\\\
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-------------------------------\\\\
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