If [math](4,2)[/math] and [math](6,18)[/math] lie on a line perpendicular to [math]2x+ay=14[/math], what is the value of [math]a[/math]?
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If [math](4,2)[/math] and [math](6,18)[/math] lie on a line perpendicular to [math]2x+ay=14[/math], what is the value of [math]a[/math]?
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