Answer:
D. 3x + 5 = 2x -6
(2+6x)+(3-x)
5+5x is your answer
8N - 4 border tiles.
Step-by-step explanation:
There are 4 border tiles in each corner and between the tiles there are N-2 tiles along the 4 sides.
So the number of border tiles
= 4+ 4(N - 2)
= 4 + 4N - 8
= 8N - 4.
4
Answer less than 250