Anyone knows how to do this one please

Julia chooses a card at random from her set of cards. what is the probability that the card is labeled cat or hamster?

Negative 5 1/12 + negative 4 1/4 + 6 3/4

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