if y varies inversly as x and y=12 when x=10 find y when x =15
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Updated 5/6/2014 8:07:18 PM
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User: if y varies inversly as x and y=12 when x=10 find y when x =15

Weegy: Inverse variation is increase of a variable but is decrease to the other. If x = 10 and y = 12 then y will be subtracted by 5 when x = 15. Therefore, y = 7 when x = 15.

Question
Updated 5/6/2014 8:07:18 PM
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3
y varies inversly as x, the equation is y = k/x where k is the constant,
we were given y=12 when x=10,
so k = xy = 10*12 = 120;
The equation is y = 120/x;
When x =15, y = 120/15 = 8
Confirmed by jeifunk [5/6/2014 8:09:08 PM]

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