The variable z is inversely proportional to x. when x is 19, z has the value 0.68421052631579.

What is the value of z when x = 12?

z = 1.083

z ≈ 1 (that is z is approximately equals to 1)

Step-by-step explanation:

from the question,

z ∝ 1/x

z = k * 1/x ... where k is the constant of proportionality

z = k/x

when z = 19

x = 0.68421052631579

k = ?

z = k/x

k = z * x

k = 19 * 0.68421052631579

k = 13

to find the value of z when x = 12

from

z = k/x

z 13/12

z = 1.083

z ≈ 1 (that is z is approximately equals to 1)