Answer
64.7
Work Step by Step
$$y=0.514x-14.75$$
where y= 18 inches,$$18=0.514x-14.75$$
$$32.75=0.514x$$
$$\frac{32.75}{0.514}=\frac{0.514x}{0.514}$$
$$x=\frac{32.75}{0.514}\approx64.7$$
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