We select four distinct integers from the set {1,2,…,20} , uniformly at random (all quadruples of distinct integers are equally likely), and arrange them in ascending order. find the probability that after ordering them, the second number is equal to 7 .

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 do you find the area of a triangle

Factor the expression using gcf 9b+45