Use the Distributive Property to find (x+ 1) (x+ 3).

x² + 4x + 3

Step-by-step explanation:

Given

(x + 1)(x + 3)

Each term in the second factor is multiplied by each term in the first factor, that is

x(x + 3) + 1(x + 3) ← distribute both parenthesis

= x² + 3x + x + 3 ← collect like terms

= x² + 4x + 3

true

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.