Add the downward diagonal products and subtract the upward products

find the area of the parallelogram whose vertices are listed

Find the determinants in Exercises 5–10 by row reduction to echelon form

If E[X]=1 and Var(X)=5, find (a) E[(2+X)^2] (b) Var(4+3X)

A player throws a fair die and simultaneously flips a fair coin