Find the difference between the cash price and the payment plan and calculate the interest rate for the following questions.
a food processor for $149.50 cash, or $5.00 down and $10.00 per month for 15 months

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.