in the adjoining figure ABCD and BCEF are parallelograms AE parallel BC prove that parallelogram ABCD = parallelogram BCEF

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?

Lee has $1.75 in dimes and nickels. the number of nickels is 11 more than the number of dimes. how many of each coin does he have?

Average acceleration: i have no idea how to do this.