Answer: 
Step-by-step explanation:
 You can use the following formula:
 
 You can say that "T" is the time (in minutes) for both faucets working together, "A" is the time (in minutes) for cold water faucet working alone and "B" is the time (in minutes) for hot water faucet working alone.
 Based on the data given in the exercise, you can identify that:
 
 Therefore, substituting these values into the formula and solving for "B", you get that this is:
 
 
        
             
        
        
        
Answer:
Y=-3
Have a good day and please mark brainliest
Step-by-step explanation:
 
        
             
        
        
        
Answer:
a
 The null hypothesis is  
The alternative hypothesis  
b
 
c
     The decision rule is  
Fail to reject the null hypothesis
Step-by-step explanation:
From the question we are told that 
   The value given is  
S/N
1       7 5
2      4 3
3      8 7
4      8 8
5      7 9
6      7 5
7      6 5
Generally the sample mean for the first sample  is  mathematically represented as 
         
=>     
=>     
Generally the sample mean for the second sample is mathematically represented as 
         
=>     
=>     
Generally the sample standard deviation  for the first sample  is  mathematically represented as 
            
=>       
=>       
Generally the sample standard deviation  for the second  sample  is  mathematically represented as 
            
=>       
=>       
Generally the pooled standard deviation is  
       
=>    
=>    
The null hypothesis is  
The alternative hypothesis  
Generally the test statistics is mathematically represented as 
       
=>   
=>   
Generally the degree of freedom is mathematically represented as 
      
=>   
=>   
From the t distribution table the probability of   at a degree of freedom of
 at a degree of freedom of  is
 is  
      
Generally the p-value is  
       
From the values  obtained we see that  hence
  hence  
    The decision rule is  
Fail to reject the null hypothesis
 
        
             
        
        
        
 
-- The square of the shortest side . . . 16² = 256
-- The square of the medium side . . . 30² = 900
-- Their sum . . . (256 + 900) = <u>1,156</u>
-- The square of the longest side = 35² = <u>1,225</u>
1,156 and 1,225 are not equal, so these 3 numbers 
<em>can</em> be the sides of a triangle, but it's not a right one.
The statement is <em>false</em>. (choice 'b')
        
             
        
        
        
Answer: c
Step-by-step explanation: 23/99 as a fraction