Choose the correct answer in Exercises 22 and 23 22 Distance between the two planes: 2x + 3y + 4z = 4 and 4x + 6y + 8z = 12 is
(A) 2 units
(B) 4 units
(C) 8 units
(D)
2
29
 units
23 The planes: 2x – y + 4z = 5 and 5x – 2