Which expression can be used to determine the nth term in the pattern below 20,25,30,35,40

see explanation

Step-by-step explanation:

These are the terms of an arithmetic sequence with n th term

= a + (n - 1)d

where a is the first term and d the common difference

d = 25 - 20 = 30 - 25 = 5 and a = 20, hence

= 20 + 5(n - 1) = 20 + 5n - 5 = 5n + 15 ← n th term formula

step-by-step explanation:

wrgasadvauoyfaiua-00uhf

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.