Hi i hAvE aLL tHesE pOiNTs bUt I doN'T aSk QuEsTIoNs sO uM teLl mE HoW yOur DaY waS?

Triangle jkl was dilated using the rule dm, 1/3 the image, triangle j’ k’ l’ is the result of the dilation. a.5 units b.7.5 units c.10 units d.12.5 units

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

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?