I need help on a problem

What is the value of x? enter your answer in the box. (cm)

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?

How many lines can be drawn through points j and k? 0 1 2 3