White an expression that is equivalent to 3(7 + x )

21 + 3x

Step-by-step explanation:

Use the distributive property to multiply each of the umber by 3 and then you will get 21 + 3x

Hope this helps :)

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.