Suppose X and Y are random variables with joint density function. So.1e-(0.5x + 0.2y) if x > 0, y = 0 f(x, y) = 10 otherwise (a) Is f a joint density function? Yes Or No (b) Find P(Y > 4). (Round your answer to four decimal places.) Find P(X = 5, Y = 7). (Round your answer to four decimal places.) (c) Find the expected value of X. Find the expected value of Y.

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Desmond wants to sell his car that he paid $8,000 for 2 years ago. the car depreciated, or decreased in value, at a constant rate each month over a 2-year period. if x represents the monthly depreciation amount, which expression shows how much desmond can sell his car for today? 8,000 + 24x 8,000 - 24x 8,000 + 2x 8,000 - 2xdesmond wants to sell his car that he paid $8,000 for 2 years ago. the car depreciated, or decreased in value, at a constant rate each month over a 2-year period. if x represents the monthly depreciation amount, which expression shows how much desmond can sell his car for today? 8,000 + 24x 8,000 - 24x 8,000 + 2x 8,000 - 2x

In stepmber, daniel and justin opened a business. during their first three months of business, their average monthly profit was $51. if during their first month, they lost $29, and during their second month, they gained $115, what was their profit or loss for their third plzzz i will give you 299 points