Which is an equivalent expression of: −2(5r+ 3) + 9r?
A) −19r – 3
B) −10r – 6
C) −10r+ 3
D) −r– 6

-r - 6

Step-by-step explanation:

use distributive property

-2(5r + 3) +9r

= -10r - 6 +9r

= -r - 6

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.