waecmaths question:
If x varies inversely as y varies directly as z , what is the relationship between x and z
Option A:
$x\propto z$
Option B:
$x\propto \tfrac{1}{z}$
Option C:
$x\propto {{z}^{2}}$
Option D:
$x\propto {{z}^{\tfrac{1}{2}}}$
waecmaths solution:
$\begin{align} & x\propto \frac{1}{y} \\ & y\propto z \\ & x\propto \frac{1}{z} \\\end{align}$
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