What is x if the equation is 2x=8 and it's not 4 cause it's not one of the answer choses HELP nobody I'm with can get it

Acircle has a circumference of 28.36 units what is the diameter of the circle

What is the value of p in the equation y^ = -4x?

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.