Two of the angles in a triangle measure 50° and 27°. find the measure of the third angle.

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 expression represents the total perimeter of her sandwich, and if x = 1.2, what is the approximate length of the crust?

With this question, the answer with the red arrow is incorrect!