The angle between two plane is 3x+2y-z=7 and x-4y+2z=0 is

For the inequality |c| < |d| to be true, which of the following must be true?

Events a and b are independent. the probability of a occurring is 2/5. the probability of b occurring is 1/4. what is p(a and b)?

Which graph represents the same relation is the sa which graph represents the same relation as the set {(-3-2)}