For any two random variables x, y the covariance is defined as cov(x, y ) = e[(x − e[x])(y − e[y ])]. you may assume x and y take on a discrete values if you find that is easier to work with.

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

hope this

f(2x−x2)=−3x2+6x−1

step-by-step explanation:

set up the composite function and evaluate.

f(2x−x2)=−3x2+6x−1

5+2x=a

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