A bag contains 7 red marbles, 3 blue marbles and 8 green marbles. If three marbles are drawn out of the bag, what is the probability, to the nearest 10th of a percent, that
all three marbles drawn will be green?

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?

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

Bring the fraction a/a-4 to a denominator of 16-a^2