SOLUTION: y varies inversely as x. If y = 40 when x = 5​, find y when x = 20

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Question 1080752: y varies inversely as x. If y = 40 when x = 5​, find y when x = 20
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

if y varies inversely as x, we have
y=k%2Fx
If y+=+40 when x+=+5​,we can find k:
40=k%2F5
40%2A5=k
k=200

so, y when x+=+20+ will be:
y=200%2F20
y=10