28 - f =30.5 What is the value of f

What is the smallest integer n such that n\sqrt{2} is greater than 20

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions.a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4