Domain and range. someone i need a thorough explanation cause this ain’t getting through my brain and i have like 29849292 other assignments

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76

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