Let x, y and z be independent normal random variables with expectation −2,3,1 and variances 4, 9, 36 respectively.

a. find e(f(x, y,z)) where f(x, y,z)=2+yz−3x2y+6x2y2z2.
b. find p(2x+y ≥3z−y)

Tamera puts 15/4 gallons of gasoline in her car. which mixed number represents the gallons of gasoline? a) 2 3/4 gallons b) 3 1/4 gallons c) 3 3/4 gallons d) 4 1/2 gallons answer it's worth a lot of points!

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

Madeline takes her family on a boat ride. going through york canal, she drives 6 miles in 10 minutes. later on as she crosses stover lake, she drives 30 minutes at the same average speed. which statement about the distances is true?