Cual es la longitud de la base inferior zx

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 final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?

How long does it take natsumi to clean up after she is done? table: .area time30. 245. 2.7560. 3.5