Mathematics, 11.07.2019 01:30 awesomegrill
If y varies directly as x, and y is 180 when x is n and y is n when x is 5, what is the value of n?
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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} \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ \textit{we also know that } \begin{cases} y=180\\ x=n \end{cases}\implies 180=kn\implies \cfrac{180}{n}=k](/tpl/images/0075/3334/85cfd.png)
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If y varies directly as x, and y is 180 when x is n and y is n when x is 5, what is the value of n?...
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