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y varies inversely with x. If y = 40 when x = 16, find x when y = -5.

 Mar 26, 2021
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This means that xy will always be the same. We know that xy = 40*16 = 640

 

xy = 640

in our second case, y = -5. 

So -5x = 640. 

What's x?

 

=^._.^=

 Mar 26, 2021

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