Applications for systems of equations sarah went to borders and bought 2 cds and 4 dvds for $109.94 adam bought 3 cds and 2 dvds for $84.95. if all cds are the same price, and all dvds are the same price, how much is a single cd and how much is a single dvd?

Cot(90° − x) = 1 the value of x that satisfies this equation is °. a. 60 b. 135 c. 225 d. 315

Given that abcd is a rhombus, what is the value of x?

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.