Answer:
b
Step-by-step explanation:
100%
Answer:
x²+4=0
Step-by-step explanation:
x²=-4
√x² = √-4
x = 2i
x is an imaginary number
Answer:
40 days saw either rain or high winds
Step-by-step explanation:
We solve this question using Venn sets.
I am going to say that:
Set A: Rain
Set B: High winds.
18 days saw rain
This means that 
29 days saw high winds
This means that 
7 days saw both rain and high winds.
This means that 
How many days saw either rain or high winds?
This is

Sp

40 days saw either rain or high winds