V is unknown.

Should I have bet the turn for value? Was afraid (nitty?) of a c/r when the 9 came on the turn. I figure QQ+ is out of his range... now I dont' know why I didn't bet on the turn? bleh

Full Tilt No-Limit Hold'em, $0.10 BB (8 handed) Full-Tilt Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP2 ($3.45)
CO ($9.75)
Button ($4.85)
SB ($10.50)
Hero ($10)
UTG ($3.40)
UTG+1 ($5)
MP1 ($5.55)

Preflop: Hero is BB with J, J. SB posts a blind of $0.10.
Hero raises to $0.4, 3 folds, CO calls $0.40, 1 fold, SB (poster) calls $0.30.

Flop: ($1.20) 2, 9, 7 (4 players)
SB bets $1.2, Hero raises to $3, CO folds, SB calls $1.80.

Turn: ($7.20) 9 (3 players)
SB checks, Hero checks.

River: ($7.20) 9 (3 players)
SB bets $1.6, Hero calls $1.60.

Final Pot: $10.40