Half of the 30 squares below are to be marked with an x.

X = y30

(30 x 4 + denominator = (x-y)

(y + ) - 40y = frac(/87^>5/6)

5 - 6 (9.99999999) 405

*7>8 (405) divided by the equal amount

=y - 8 (49>0)

2^y = ln 5, or   y(ln 2) = ln 5.   solving for y,   y = (ln 5) / (ln 2).   y=5

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.