Solve using Elimination method 2x-y=6 and x+y=6

Step-by-step explanation:

2x-y=6 (1)

x+y=6 (2)

Adding (1) and (2)

3x = 12

x=4

Substitute x on equation (2)

4+y=6

y=2

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