I would appreciate if someone could help me with this problem and answer it I will give you a brainlist :)

Nine more than four times a number is the same as one less than twice the number. find the number?

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

The area of a circle is equal to 1 dm². find the radius of the circle.