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Mathematics 17 Online
OpenStudy (anonymous):

If x varies jointly as y and z, and x = 8 when y = 4 and z = 9, find z when x = 16 and y = 6.

OpenStudy (tennistar):

x = 8 -> x = 16 y = 4 -> y = 6 z = 9 -> z =? now look for patterns.

OpenStudy (tennistar):

12 ok? http://openstudy.com/study#/updates/4e3622300b8ba7b2da42c1f4

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