Aseamstress has 1/4 of a foot of thread. then she uses 1/5 of a foot of thread to sew a hole. how much of the tread is left? a 9/20 of a foot b 3/20 c 1/20 d 1/16

It’s c.

Step-by-step explanation:

1/4 -1/5 is 1/20 because 1/4 is 5/20 and 1/5 is 4/20 and 5/20-4/20 is 1/20.

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.