If A over b and x over y represent rational expressions and b is not equal to 0 and y is not equal to 0 , what is true of their product? Choose three correct answers.

Multiply the numerators and denominators: (A/b)(x/y) = Ax/(by), since b and y are both nonzero. This is a rational expression, so C is true; it is also the ratio of Ax to by, making D true. Choice B gives the same product because (A/y)(x/b) = Ax/(by), while choice E places y as a factor outside the denominator.

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