Please explain your answer with steps Suppose X and Y are random variables such that E[X] = -3 and E[Y] = 6. Then E[X-Y] equals: Suppose that X and Y are random variables such that E[X] = -2and E[Y] =...

Extracted text: Please explain your answer with steps Suppose X and Y are random variables such that E[X] = -3 and E[Y] = 6. Then E[X-Y] equals: Suppose that X and Y are random variables such that E[X] = -2and E[Y] = 4. Then E[-X] equals: Suppose that X and Y are random variables such that E[X] = -1 and E[Y] = 2. Then the random variable 2X+Y must be always equal to zero not necessarily always equal to zero and has an unknown expected value not necessarily always equal to zero but has an expected value equal to zero 2X + Y is not a random variable Suppose X is a random variable such that Var(X) = 2. Then Var(-X) equals Suppose X is a random variable such that Var(X) = 1. Then Var(4X) equals Suppose X is a random variable such that Var(X) = 1. Then Var(X+2) equals