PLEASE HELP 10 POINTS + BRAINLIEST

A freight train averages 40 mi/h traveling to its destination with full cars and 50 mi/hr on the return trip with empty cars. What is the train’s average speed for the entire trip? Round to the nearest tenth.

Please show work

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.