Valeriecompton Valeriecompton

13-04-2018
Mathematics

contestada

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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hhuynh7148 hhuynh7148

13-04-2018

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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