Problema Solution
y varies jointly as x and z. y=48 when x=6 and z=4. Find y when x=7 and z=2.
Answer provided by our tutors
48=k*6*4
k = 2
so then
y= 2xz
so then plugging in x = 7 and z =2
y= 2*7*2
y= 28
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