-10 = -n + 2 - 2n how do u solve this pls

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 areas of two similar triangles are 72dm2 and 50dm2. the sum of their perimeters is 226dm. what is the perimeter of each of these triangles?

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83