The width of a rectangle is 3/4 the length. the perimeter is 252 cm. what is the width of the rectangle? a) 36 cm b) 48 cm c) 54 cm d) 72 cm

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