What is another word for coinsurande

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab

I’m confused on how to work the pie charts