SOLUTION: If y varies inversely as x and y=5 when x=3, find the equation of variation and the value of x when y=7.

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Question 414293: If y varies inversely as x and y=5 when x=3, find the equation of variation and the value of x when y=7.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

y varies inversely as x  OR  y = k/x

 y=5 when x=3    5 = k/3  k = 15

  y = 15/x

Finding the value of x when y = 7

  7 = 15/x

  x = 15/7 



CHECKING our Answer***

 7+=+15%2F%2815%2F7%29