Classify triangle FDA. Please. Quickly thank you

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

Write an inequality and solve each problem.for exercises 11 and 12, interpret the solution.

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?