Ishaan is three times as old as christopher is also 14 years older than christopher. how old is ishaan

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?

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents

Last one and the bottom answer choice is y=(x-4)^2+1 you guys!