Which of the following must always be true about vertical angles? (5 pts) 1. They are always supplementary

2. They are always adjacent

3. They are always congruent

4. They are always complementary

The human resources manager at a company records the length, in hours, of one shift at work, x. he creates the probability distribution below. what is the probability that a worker chosen at random works at least 8 hours? probability distribution px(x) 6 hours 7 hours 8 hours 9 hours 10 hours 0.62 0.78 пол