Margo can purchase tile at the store for $0.79 per tile and rent a tile saw for $24. at another store she can borrow the tile saw for free if she buys tiles there for $1.19 per tile. how many tiles must she buy for the cost to be the same at both stores.

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.

the answer is 15 to your question