How many solutions does the system of equations have explain 2.5(x+4)=4.1x+16-1.6x

Find the solution set of this inequality. select the correct graph. |8x+16|> 16

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

What is x3+3x2−16x−48 divided by x−1?