Question

If y varies directly as x and inversely as z, and y=22 when x=4 and z=6, find y when x =10 and z = 25.
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Answer 1

Solution:
y = kx/z
22 = k(4)/6
22(6) = k(4)
132 = k(4)
132/4 = k
k = 33
y = kx/z
y = (33)(10)/25
y = 330/25
y = 66/5