sherinamurray sherinamurray

04-06-2017
Mathematics

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y varies jointly as x and z. y = 56 x=4 and z =7. Find y when x=8 and z=5

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SammyAces SammyAces

06-06-2017

Y varies jointly as x and z, here means y is proportional to x and z.
y = k*x*z
56 = k*4*7
k = 2
y = 2*8*5
y = 80.

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