Agiant bamboo plant grew an average of 18 centimeters per year. the botanist started measuring the plant when it was 5 centimeters tall. if "y" represents the number of years the botanist has measured the plant, what expression represents its height?
solve, and show each step.

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.