Answer
$y = 12$ cm
$z = 6$ cm
Work Step by Step
1. Solve for $y$
$\frac{10}{15} = \frac{y}{18}$
$\frac{180}{15} = y$
$y = 12$ cm
2. Solve for $z$
$\frac{10}{15} = \frac{z}{9}$
$z = \frac{90}{15}$
$z = 6$ cm
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