Find the value of x.

x=19

Step-by-step explanation:

you do 180-123 because angles on a straight line add up to 180

this gives you 57

then you divide this answer by 3 which gives you the answer of x

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0

8

step-by-step explanation: