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OpenStudy (jkbo):
Please help me If y varies directly as x, and y = 12 when x = 15, find x when y = 21. A.0.83 B.26.25 C.0.8 D.24
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OpenStudy (anonymous):
direct variation is y = kx k is constant
OpenStudy (anonymous):
with y = 12 and x = 15 solve for k
OpenStudy (anonymous):
after you determine this step we will continue..
OpenStudy (jkbo):
I got 0.8 @JuanitaM
OpenStudy (anonymous):
great... so k = .8 now the problem says what is x when y is 21
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OpenStudy (anonymous):
how are you doing...
OpenStudy (jkbo):
Iam doing great, But I'm not sure what to do next. divide 21 and 8?
OpenStudy (anonymous):
|dw:1379890999288:dw|
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