Question 320055: if x varies inversely as v, and x=14 when v=2, find x when v=4.
Answer by nerdybill(7384)   (Show Source):
You can put this solution on YOUR website! if x varies inversely as v, and x=14 when v=2, find x when v=4.
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When you see "x varies inversely as v"
You're suppose to automatically think:
x = k/v
where k is a constant
.
To find k, we use "x=14 when v=2":
x = k/v
14 = k/2
28 = k
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We now have this as the relation:
x = 28/v
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Finally, we can answer: "find x when v=4"
x = 28/v
x = 28/4
x = 7
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