If john solves 13 math puzzle more on sunday then thursday. if he solve 31 math puzzle on sunday, how many did he solve for both days

What two criteria are needed for triangles to be similar

Identify the graph of y = ln x + 1.

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