book Maths Puzzle Numerical Ability

Please show the similarities between dividing two fractions and dividing two rational expressions using examples of each; explain your steps.

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book Other Question

Two cyclists begin traveling in the same direction on the same bike path. One travels at 20mph and the other at 14 mph. after how many hours will they be 15 miles apart? Multipy the rational expression. Simplify the result.

(x^2 - 2x/x^2 + 2x + 1) * (x^2 + 4x + 3/x^2 + 3x)