There's an app called photo math that can really help you with your problem
Answer:
Step-by-step explanation:
when multiplying exponents, as long as the base is the same, you add the power. 
Combine like terms:
7x-2x= 5x
-10+24= +14
Answer: 5x+14
Answer:
No, there is no parameter contained in this statement
Step-by-step explanation:
Given that H0 : µ = 9
We have to check whether this is a valid null statement
Normally null hypothesis would have equal to sign and the value to be tested would be a statistic i.e. a measure characteristic of a sample.
So we create null hypothesis as sample mean = 9 or \mu or sample std deviation and so on.
Here population parameter mu is equated to 9
Hence not a valid null hypothesis.
No, there is no parameter contained in this statement
