STARTER1986 STARTER1986

02-12-2017
Mathematics

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If we know that u varies inversely as x and y =8 when x=15, what is y when x=10? What is the constant of variation?

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altavistard altavistard

02-12-2017

The appropriate math model would be y = k/x.

Unsure of why you are using " u " here.

If y = 8 when x = 15, then 8 = k/15, and k = 120. This is the const. of var.

Then y = 120/x. If x = 10, y = 120/10 = 12.

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