(2x^2+13x-7) divides by (x-6)

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.

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

Find the missing dimension! need asap! tiny square is a =3025 in ²