ANSWER ASAP PLEASE FOR BRAINLIEST

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

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

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?