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1. find the mean of three numbers x, y and z,
a.express x in terms of а, y and z
b find x when a=5, y=2 and z=1
3. y x varies directly as y and inversely as z and x 27, y =9 and z =2​

1 find the mean of three numbers x y and z aexpress x in terms of а y and z b find x when a5 y2 and z1 3 y x varies directly as y and inversely as z and x 27 y class=

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i dont know

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