The variables x and y vary inversely. Use the given values to write an equation relating x and y. Then find y when x=3. x=1, y=3

An equation is y=

When x=3, y=

It says factor each expression 49x-28?

I’m stuck on this equation, anyone got the answer?

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.