Answered

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Assume that a varies directly as b.When the value of a is 5,the value of b is 18.When the value of a is 22,what is the value of b?

Sagot :

In this case we have the proportion 18:5, then we have the equation

[tex]\begin{gathered} \frac{18}{5}=\frac{b}{22} \\ b=\frac{18}{5}\times22 \\ b=\frac{396}{5} \end{gathered}[/tex]

Then, when a is 22, the value of b is 396/5 that is also equal to 79.2 or

[tex]79\frac{1}{5}[/tex]

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