Given right triangle JKL, what is the value cost(L)

If there is no real number solution to the quadratic equation x^2+2x+c=0 what is a possible value of c? 1 -2 0 3

What is the name of a polygon that has four congruent sides and theses angle measures 60,120,60,120?

If mary had 320 toy cars and she gave her friend 50 cars and then she gave her brother 72 more cars how much toy cars would mary have left ● explain with proper details