PoloT607795 PoloT607795

25-10-2022
Mathematics

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the variable y varies directly as x. when x =20, y= 12 what is the value of y when x = 15a:7b:9c:18d:25

the variable y varies directly as x when x 20 y 12 what is the value of y when x 15a7b9c18d25 class=

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KayteeS414588 KayteeS414588

25-10-2022

To direct variations use a rule of three, as follow:

[tex]\begin{gathered} \frac{?}{12}=\frac{15}{20} \\ \\ ?=12*\frac{15}{20} \\ \\ ?=\frac{180}{20} \\ \\ ?=9 \end{gathered}[/tex]Then, when x=15, y is 9

Answer: B.9

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