Determine the solution for x^2-3x-28 is greater than or equal to 0 A. [–7, 4]

B. [–4, 7]

C. (-∞,-4) or (7,∞)

D.(-∞,-7) or (4,∞)

Match each inequality to the number line that represents its solution

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

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.