Consider the arithmetic sequences to the right. Use a system of equations to answer questions 1-5 below. 30, 47, 64, 81
950, 927, 904, 881,
1. Write an explicit equation for the first sequence. Let y represent the value of the xth term. When x is 0, that is the first term of the sequence,

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.