Write --X2 = 15 in standard form.

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?

Find the zero function by factoring (try to show work) h(x)=-x^2-6x-9

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?