Sam invested $1000, some at 7% interest and the rest at 8%. How much did he invest at each rate if he received $78.00 in interest in one year?

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

1foot = 12 inches; 1 yard = 3 feet

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.