Simplify (5xy-8x^(4)y+2y^(3))+(7x^(4)y+7xy-4 y^(3))

12xy - x^4y - 2y^3

It seems difficult up close, but it's fairly simple. You need to write the same varibles out, group and combine like terms, and you should get this answer.

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.

9 x 8 divided by (5-3)=36