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13-07-2015
Mathematics

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If y varies directly as x, and y=25 as x=5, find y when x=7.

Respuesta :

13-07-2015

[tex]Direct\ variation:y=kx \\ \\ y=kx \\ 25=5k \\ \frac{25}{5}=k \\ 5=k \\ \\ y=5x \\ y=5(7) \\ y=35 [/tex]

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