Please help please please I will give brainliest to best answer-only 2 questions
I need the answer and an explanation on how

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.

What will the graph look like for a system of equations that has no solution? a. the lines will be perpendicular. b. the lines will cross at one point. c. both equations will form the same line. d. the lines will be parallel.

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.