Which value of y makes the two matrices inverses of each other? the 2 by 2 matrix, row 1, column 1, 6 column 2, 14 row 2, column 1, negative 2 column 2, negative 4 the 2 by 2 matrix, row 1, column 1, negative 1 column 2, negative 7 halves row 2, column 1, y column 2, 3 halves