Twice the difference of a number and 5

(# - 5) x 2

or

(# - 5) 2

I think it should look Iike this but I might be wrong.

  q

step-by-step explanation:

each line from a vertex to the midpoint of the opposite side is called a median. the point where the medians intersect, point q, is the centroid.

the centroid of δabc is point q.