PLEASE HELP Which operations can be applied to a matrix in the process of Gauss-Jordan elimination? (choose ALL correct answers)

A. replacing a row with twice that row
B. replacing a row with the sum of that row and another row
C. replacing a row with three times another row
D. swapping rows
E. replacing a row with the absolute values of that row

Find the area of the regular hexagon if a side is 20 cm.

James wants to promote his band on the internet. site a offers website hosting for $4.95 per month with a $49.95 startup fee. site b offers website hosting for $9.95 per month with no startup fee. for how many months would james need to keep the website for site a to be a better choice than site b?

The equation represents the function f, and the graph represents the function g. f(x)=3(5/2)^x determine the relationship between the growth factors of f and g. a. the growth factor of g is twice the growth factor of f. b. the growth factor of f is twice the growth factor of g. c. the growth factor of f is 2.5 times the growth factor of g. d. the growth factor of f is the same as the growth factor of g.