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noname [10]
3 years ago
11

If the equation is 0.90•r=s Is it proportional?

Mathematics
1 answer:
zhannawk [14.2K]3 years ago
4 0

\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}\\\\ \stackrel{\textit{\underline{s} is directly proportional to \underline{r}}}{0.90r=s}\qquad \qquad \qquad 0.90\impliedby \textit{constant of variation}

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mihalych1998 [28]

Answer:

(5 , 7)

Step-by-step explanation:

let a = the number of adult tickets

let c = the number of children tickets

then we have to solve the following system

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we proceed by Substitution:

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How can you do this? By isolating the variable, or having only it on one side of the equals sign. 

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