Answer:
The answer is A
Step-by-step explanation:
The identity property of addition simply states that when you add zero to any number, it equals the number itself.
Answer:

Step-by-step explanation:
The given polynomials can be added together by adding like terms together as shown below:
=> Add together, the coefficient of all terms that have the power of 3.




=> 


=> 


=> 


The answer = 
The sample mean is μ=105, and sample standard deviation is σₓ=
.
The Z-score is
.
Refer to standard normal distribution table.
The required probability is
