algebra

Express the statement as a formula that involves the variables w, z, u and a constant of proportionality k, and then determine the value of k from the condition : w varies directly as z and inversely as the square root of u, if z = 3 and u = 4, then w = 18

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asked by DOREEN
  1. w=kz/sqrtU

    k=w*sqrt(U)/z= 18*2/3=12? check that.

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