Can an octagon have angles that measure 140, 120, 50, 95, 105, 100, 80 and 150

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.

The graph of f(x) = |x| is transformed to g(x) = |x + 11| - 7. on which interval is the function decreasing?

Fast! find the length of cu. the triangles are similar. show your work.