I need the value of A

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?

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class