- What is the joint probability density function for X+Y?

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Suppose the vector v has magnitude 68 & makes an angle of 127 deg. w/ the positive x=axis v is in standard position write v in form v=ai+bj? Polynomial function values HELP!!? Can the sample standard deviations s1 and s2 be used in place of the population standard deviations σ1 and σ2? Find all open intervals on which the function f(x)= x^2/(x^2)+4 is decreasing? Find the area contained within the polar curve r = sin(θ) − 1. Find the slopes of
the polar curve at the points θ=(0, π, 3π/2).?

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