Answer:
It isn't necessary but having a positive coefficient for
makes things like completing the square and factoring easier.
Answer:
12.4 did this before
Step-by-step explanation:
The answer X= -10 y= -5
Hope this is helpful
In order they are
1.1 * 10^12, 9.5 * 10^11 and 5*10^8
Answer:
The null hypothesis is 
The alternative hypothesis is 
Step-by-step explanation:
From the question we are told that
The sample size is n = 315
The population proportion is p = 0.94
The number of luggage that was recovered and reunited with the passenger in one day is k = 276
Generally the sample proportion is mathematically represented as

=> 
=>
The null hypothesis is 
The alternative hypothesis is 