Mathematics, 01.07.2019 10:30 pineapplepizaaaaa
The total cost of an item including sales tax is directly proportional to its price. if the total cost of a $25 item is $25.75, what is the total cost on a $60 item? a)$60.75 b)$618 c)$61.80 d)$103
Answers: 2
![\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}](/tpl/images/0038/3691/894da.png)
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The total cost of an item including sales tax is directly proportional to its price. if the total co...
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