Which represents all the values of x that make the rational expression -6x + 42/3x + 9 undefined?

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.

Can any one me with the answers to these questions asap?

Which one is true about the hexagons ?