The variable 𝑧 z is inversely proportional to 𝑥 x . When 𝑥 x is 4, 𝑧 z has the value 3.25. What is the value of z when x=11

Question

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Answer 1

z = k/x

Since z = 3.25 when x = 4, 3.25 = k/4.

So, k = 4(3.25) = 13

z = 13/x

Therefore, when x = 11, z = 13/11