What is 9+10 A 19 B 28 C 80 or D1068

Restrictions on f(x) = 1/x+5 and g(x) = x-2

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

X^2/100+y^2/25=1 the length of the major axis is: a)5 b)10 c)20