mizbetteqkamicholo
mizbetteqkamicholo mizbetteqkamicholo
  • 21-07-2016
  • Mathematics
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If x varies directly as y, and x = 48 when y = 16, find x when y = 5.

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meerkat18
meerkat18 meerkat18
  • 21-07-2016
x directly varies with y which means as x increases, y also increases. In this case, we represent a constant of proportionality of k.

Applying laws of  proportionality, 

x =k y
48 = k* 16
k = 3

when y is 5
x = k y
x = 3* 5 
x = 15
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