Answer:
0.6 = 60% probability that it is either sunny or rainy.
Step-by-step explanation:
We solve this question treating these events as Venn probabilities.
I am going to say that:
Event A: Rain
Event B: Sun
The chance of rain is 20%
This means that 
The chance of it being sunny is 60%
This means that 
The chance of it being sunny and rainy at the same time is 10%.
This means that 
Calculate, the probability that it is either sunny or rainy.
This is:

0.6 = 60% probability that it is either sunny or rainy.
The answer is B hope this helps
3a² - 2a - 4 + 2a -3a² + 5
Put all the like terms together
= 3a² -3a² + 2a - 2a + 5 - 4
Combine like terms
= 1
Answer: 1
Answer:
It is given that in triangle XYZ, XY = 13, YZ=20, and XZ=25.Using the law of cosines, we have
CosC=\frac{a^2+b^2-c^2}{2ab}
cosZ=\frac{(YZ)^2+(XZ)^2-(XY)^2}{2(YZ)(XZ)}
CosZ=\frac{(20)^2+(25)^2-(13)^2}{2(20)(25)}
CosZ=\frac{400+625-169}{1000}
CosZ=\frac{856}{1000}
CosZ=0.856
Z=cos^{-1}(0.856)
Z=37.13^{\circ}
Step-by-step explanation: