Resolber con metodo de sustitucion porfa Una madre tiene 26 años mas que su hijo y dentro de 10 años tendra el doble de años que su hijo.¿Cuantos años tiene en la actualidad?

If 30 lb of rice and 30 lb of potatoes cost ? $27.60? , and 20 lb of rice and 12 lb of potatoes cost ? $15.04? , how much will 10 lb of rice and 50 lb of potatoes? cost?

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.

An elevator travels 310 feet in 10 seconds. at that speed, how far can't his elevator travel in 12 seconds?