What is the term, coefficient and constants of 6+n2+12d

Coefficient is 2 and 12. Constant is 6.

Step-by-step explanation: Coefficient is the numbers that multiply the variables or letters so 2 and 12 is coefficient. Constants are terms without variables so 6 is a constant.

b

step-by-step explanation:

18

step-by-step explanation:

draw the shape and you will see that f and k are actually at adjacent vertices (points of the hexagon that are neighboring).   so find the distance between (1,2) and (4,2).   that is easy since (1,2) and (4,2) is just a vertical distance to count, which is 3.   it is a regular polygon which means all sides are congruent.   you have 6 sides (hexa) so multiply 6 by 3 to receive 18.