Respostas

2014-04-11T20:20:33-03:00
Xg=xa+ xb +xc÷ 3

xg=0+4+(-2) ÷3
xg=2 ÷3
xg=0.66


yg=ya+yb+yc ÷3
yg=1+(-6)+(-4) ÷ 3
yg= -9 ÷3
yg=-3

xg= 0.66
yg= -3



espero ter sido útil