z varies directly with x and inversely with y. When x = 6 and y = 2, z = 15. What is the value of z when x = 4 and y = 9?
1 answer:
Answer: z =2.22
Step-by-step explanation:first determine the constant. Z= K(X/Y) if z is 15, x is 6 and y is 2 then 15= K(6/2) then K is 5.
When x is 4 and y is 9 . k is 5 then
Z ,= 5(4/9) = 2.2.
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