The sum of a number and 5 is -35?

The unknown number is -40

Step-by-step explanation:

Let x = the unknown number

x + 5 = -35

Subtract 5 from both sides

x = -40

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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

b, i believe, but not sure.