a formula of stopping distance of an average car is s = x to the power of 2 over 20 + x where s is the stopping distance and x is the the crs speed if a car is 7f ft from the intercection at which it must stop whats the max speed it can be driving

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

If 3x+8=3x+8 is it one solution or no solution

Pls math have no ideamultiply and simppify. 2x^2y^3z^2 • 4xy^4x^2