u = p r t r = u / p t
Find the missing letter F-O-R T-A-R P-U-_
15 players on a rugby team
irrupt
Suppose you have the fractions p/q and r/s. Let the LCM of q and s be t.Then t is a multiple of q as well as of s so let t= q*u and t = s*v Then p/q = (p*u)/(q*u) = (p*u)/t and r/s = (r*v)/(s*v) = (r*v)/t have the same denominators.
"Irrupt" is spelled as I-R-R-U-P-T.
The link below has the info you requested.
I would finish it with the letter 't'.
15 Players In A Rugby Varsity Team
If the coordinates of the three vertices are A = (p, s) B = (q, t) and R = (r, u) then centroid, G = [(p+q+r)/3, (s+t+u)/3].
Picture.
p-u-b-e-r-t-y