3/4X - 9 = 27 what does x equal?

How do i do this activity, is appreciated

What is the solution set of the quadratic inequality x^2-5< or equal to 0

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