If x and y are positive integers, is xy a multiple of 18? (1)x is a multiple of 6. (2)y is a multiple of 15.

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If <em>x</em> and <em>y</em> are positive integers, is <em>xy</em> a multiple of 18? (1)<em>x</em> is a multiple of 6. (2)<em>y</em> is a multiple of 15.