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Yuri [45]
3 years ago
8

Z varies jointly with x and y.

Mathematics
1 answer:
Elan Coil [88]3 years ago
3 0
First, let's find "k" the constant of variation:

z= k.x.y (since z varies jointly with x and y)

60 =k.(2).(3) → 60 = 6k and k =10, So z = 10x.y

z= 10(4)(9) = 10(36) and z = 360

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