Answer:
2
Step-by-step explanation:
y2 - y1 / x2 - x1
-2 - 4 / -1 - (-4)
-2 - 4 / -1 + 4
-6 / 3
2
First, add them up. For her first draw, the probability of her getting a tile with an plant on it was 6/9. So when she takes one away, it will be 5/8.
Answer:
4
Step-by-step explanation:
You may recognize these as factors of the difference of two squares:
... a² -b² = (a+b)(a-b)
where a=1 and b=i√3.
Then the product is ...
... 1² -(i√3)² = 1 - 3i² = 1 +3 = 4
_____
Of course, i = √-1, so i² = -1.