Find the value of x 3,9,10,8,7,x the mean is 7

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.

What is the approximate value of  x  in the equation below.–3.396–0.7080.3040.955

Which expression is equivalent to -12(3x-3/4)