Write an Expression That Represents the Length of the Missing

question 234

Essay

Write an expression that represents the length of the missing side of this rectangle. Its area is .

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Definitions:

Random Variables

Variables whose possible values are numerical outcomes of a random phenomenon.

E(X)

The expected value of the random variable X, representing the mean or average value that X takes on.

E(Y)

The expected value of the random variable Y, representing the mean or average outcome of a set of possible values weighted by their probabilities.

Covariance

A measure that indicates the extent to which two variables change together.