All vectors are in rn. check the true statements below:

a. for any scalar c, u* (cv) = c(u*v).
b. for a square matrix a, vectors in col a are orthogonal to vectors in nul a.
c. if vectors v1; : : : ; vp span a subspace w and if x is orthogonal to each vj for j = 1; : : : ; p, then x is in w(
d. if the distance from u to v is equal to the distance from u to -v, then u and v are orthogonal.
e. v*v =llvll^ 2

What is the value of x when x + 7 = 21?

Astudy was interested in determining if eating milk chocolate lowered someone's cholesterol levels.ten people's cholesterol was measured. then, each of these individuals were told to eat 100g of milk chocolate every day and to eat as they normally did. after two weeks, their cholesterol levels were measured again. is there evidence to support that their cholesterol levels went down? how should we write the alternative hypothesis? (mud = the population mean difference= before - after)a. ha: mud = 0b. ha: mud > 0c. ha: mud < 0d. ha: mud does not equal 0

Collin did the work to see if 10 is a solution to the equation r/4=2.4