SOLUTION: If y varies inversely as x and y=40 when x=12,find y when x=15

Question 1028761: If y varies inversely as x and y=40 when x=12,find y when x=15

Found 2 solutions by stanbon, Natolino1983:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
If y varies inversely as x and y=40 when x=12,find y when x=15
--------
y = k/x
----
Solve for "k"::
40 = k/12
k = 480
-----
Equation::
y = 480/x
If x = 15
y = 480/15 = 32
-------------------
Cheers,
Stan H.
-------
Answer by Natolino1983(23) (Show Source): You can put this solution on YOUR website!
If x and y varies inversely, x times y is a constant.
We know that in thin case the constant is x�y= 12�40 = 480. So 15�y must be also 480 then y= 480/15 =32.
RELATED QUESTIONS
If y varies inversely as x, and y=12 when x=7, find y when when... (answered by CubeyThePenguin)
If y varies inversely as x, and y=18 when x=3, find when... (answered by DrBeeee)
If x varies inversely as y and x = 2 when y = 8, find x when y = 15. PLEASE... (answered by jim_thompson5910,Earlsdon)
if y varies inversely as x and y=5 when x=3 find x when y is... (answered by Cromlix)
if y varies inversely as x and y=20 when x=1/4, find y when... (answered by Alan3354)
If y varies inversely as x and y= 3 when x=4, find y (answered by greenestamps,MathLover1)
y varies inversely as x. If y = 40 when x = 5, find y when x =... (answered by MathLover1)
IF y VARIES INVERSELY AS X AND Y Y= -3 WHEN X=9, FIND Y WHEN X=81 (answered by solver91311)
If y varies inversely as x, and y=14 when x=5, find y when x=8. y=____(simplified). (answered by Cromlix)