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1 October, 01:16

Find y when x=6 and z=8 if y varies jointly as x and z and y=60 when x=3 and z=4

A. Y=6*6*10; 360

B. Y=5*6*8; 240

C. Y=5*6*10; 300

D. Y=5*5*8; 200

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  1. 1 October, 01:40
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    I think it's B because as y varies jointly as x and z, so if x and z are doubled, the y-value will be multiplied by 4 times.
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