Answer:
(0,-1) 
You can guess and check to see what gives you the answer
 
        
             
        
        
        
Simply subtract all the spent money from his budget:
$119-$45.50-$26.25-$15.25= $32
Therefore, he has $32 left for other expenses!
Hope this helps!
        
             
        
        
        
Hi there!
Pauline simplified the expression correctly.
Pauline made sure she used the distributive property and combined like terms after doing so.
Hope this helps !
        
             
        
        
        
Answer:
5
Step-by-step explanation:
3+2x = 4x-7
3+7=4x-2x
x=5
 
        
                    
             
        
        
        
Answer:


Step-by-step explanation:
For this case we have the following info given:
Weight before diet 180 125 240 150  
Weight after diet 170 130 215 152
We define the random variable  and we can calculate the inidividual values:
 and we can calculate the inidividual values:
D: 10, -5, 25, -2
And we can calculate the mean with this formula:

And the deviation with:

And after replace we got:

And the confidence interval for this case would be given by:

The degrees of freedom are given by:

For the 95% of confidence the value for the significance is  and the critical value would be
 and the critical value would be  . And replacing we got:
. And replacing we got:

