Evaluate the expression 10−5a+(18−b), where a=2 and b=11. Which THREE expressions will have the same value?

(A) 28÷(a×2)

(B) 20+b−(4×a)

(C) 49−43+(a÷a)

(D) 30−25+(b−9)

(E) 50÷a−(b+20)

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