R = { (x , y ) , and x, y belongs to Q , x=1/y } Check reflexive, symmetric and transitive

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

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This is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 5 terms.