Final answer:
Your friend scores 1440 points and you score 800 points in the game.
Step-by-step explanation:
Let's assume that your friend scores x points in the game. According to the given information, you score 5 points for every 9 points your friend scores. So, you would score (5/9)*x points.
It is also mentioned that you score 320 points less than your friend. This can be represented as:
(5/9)*x = x - 320
Solving this equation, we find that your friend's score is x = 1440 and your score is (5/9)*1440 = 800.