3x + 4y = 18 -2x + 4y = 8 can someone help me out with this?

Which statement about the graph of y = 8(0.25)^2

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?

Describe how you can act financially responsible.