A matrix with 2 rows and 2 columns, where row 1 is 2 and 5 and row 2 is 1 and 3, is multiplied by matrix with 2 rows and 1 column, where row 1 is x and row 2 is y, equals a matrix with 2 rows and 1 column, where row 1 is 7 and row 2 is 5.