Which of the following shows the correct first step to solve x^2-16x=-21 by completing the square? I'll give brainiest ASAP `

Which sentence describes why polygon mnop is congruent to polygon jklp? a. polygon jklp maps to polygon mnop through a translation. b. polygon jklp maps to polygon mnop through a rotation. c. polygon jklp maps to polygon mnop through a dilation. d. polygon jklp maps to polygon mnop through a stretch.

What value of x will make the triangles similar by the sss similarity theorem?

Which one is true about the hexagons ?