I believe its 147 in ² :))))))
2(10*3)=60
2(1/2*10*8.7)=87
60+87=147
I think its 19. should be right
to get the slope of a line, we only need two points, notice, the grid is using 2 numbers per line, so the point on the bottom-left is (-6,0) and the one on the upper-right is (6,4), so let's use those points.

<span>To take appart 8 means to subtract 8 from a number and then you will have two parts one with the number 8 and the other with the difference. So, if you want to take appart 8 from 9, you make 9 - 8 = 1. Which means that you can have 8 and 1 sperated from 9. So the answer is the third option 9 - 8 = 1.</span>
Let x and y be islands and peninsulas respectively
x+y=191919
2x+3y=454545
y = 191919- x
2x + 3 (191919 - x) = 454545
2x + 575757 - 3x = 454545
2x-3x = 454545 - 575757
-x = -121212
x = 121212
121212 + y = 191919
y = 191919 - 121212
y = 70707
Ni Hua visited 121212 islands and 70707 peninsulas