I would appreciate it if you can answer properly in this question don't answer if you don't know this lesson

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?

Determine if the equation defines y as a function of x: 2xy = 1. yes o no

Given the median qr and trapezoid mnpo what is the value of x?