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Semenov [28]
3 years ago
12

z varies jointly with x and y. When x = 2 and y = 3, z = 60. What is the value of z when x = 4 and y = 9?

Mathematics
2 answers:
kondor19780726 [428]3 years ago
6 0
2 x 3 = 6 x 10 = 60
<em>Assuming that you are using the same rule:
</em><em>4 x 9 x 10 = 360
</em>The value of z when x = 4 and y = 9 is 360. Hope this helped!
Galina-37 [17]3 years ago
3 0
When it says z varies jointly, it means z=kxy where k is constant.
x*y=6
60=k*6
k=10

Now plug in the new given values for x and y
z=10*4*9
z=40*9
z=360

Final answer: 360
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