What's the answer for all of them?

The table shows the distance traveled over time while traveling at a constant speed.

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.

One positive number is 9 more than twice another. if their product is 95, find the numbers