What is the multiplicicative inverse, or reciprocal of the fraction 7/13

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Asap! i'm not good math and i'm lost.

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0

Given: ae ≅ ce ; de ≅ be prove: abcd is a parallelogram. we have that ab || dc. by a similar argument used to prove that △aeb ≅ △ced, we can show that △ ≅ △ceb by. so, ∠cad ≅ ∠ by cpctc. therefore, ad || bc by the converse of the theorem. since both pair of opposite sides are parallel, quadrilateral abcd is a parallelogram.