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The variables x = 3/4,y= 2/9 z = 6 are related in such a way that zvaries jointly with x and y.Find z when x = --3 and y = 5.

The variables x = 3/4,y= 2/9 z = 6 are related in such a way that zvaries jointly-example-1

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Given:

x=3/4, y=2/9 and z=6

z varies jointly with x and y.

From the above data, we can obtain a relation connecting x and z.

The relation connecting z and x can be written as,


z=8x

Putting x=3/4 in the above equation,


z=8*(3)/(4)=6

So, the relation z=8x is satisfied.

Similarly, the relation between z and y can be written as

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