Which values of c will cause the quadratic equation-x^2 + 3x + c = 0 to have no real number solutions ? check all that apply .

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?

What is the value of x in the following equation. -x ^3/2 = -27

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?