By: Matt Bowers CHAPEL HILL, N.C.—Seventh-ranked North Carolina got double-doubles from Armando Bacot and Harrison Ingram and 20 points from RJ Davis, beating Virginia Tech, 96-81, on Saturday afternoon in the Smith Center. Carolina (20-6, 12-3 Atlantic Coast Conference) improved to 11-1 at home this season. The Hokies dropped to 14-11, 6-8 ACC. UNC maintained its half-game lead over Duke (11-3) and one-game lead over Virginia (11-4) in the ACC standings. The Tar Heels clinched their 64th 20-win season and their third in a row under head coach Hubert Davis. Bacot finished with 25 points and 12…