When you play a hand like 9d 7s from late position you are looking to represent a stronger hand and steal the blinds or sneak into a monster and break someone. Here's what I see wrong with this play:

1. you don't raise it enough - make it .50 to go - you want to get their attention and make them think - that takes more in .5/.10

2. the flop is good for you because its likely your villain missed but he minbets you. Why? Do you have a read on him? Does he do this with TP? People do all sorts of things in .5/.10 so don't think he's being sneaky or trying to get information. Based on your read you either need to fold or come back at him with a pot sized bet. With all the passive plrs in .5/.10 I would fold it. You will likely get called with bottom pair or lower.

3. If he calls your bet, you are done. There is no way you will get him off his hand at that point. Especially in .5/.10.