Answer:
 26 miles per gallon
Step-by-step explanation:
 
        
             
        
        
        
Answer:
235
Step-by-step explanation:
Add the labeled angles
23+40+92+80
235
 
        
                    
             
        
        
        
Answer:
-10,10
Step-by-step explanation:
The given quadratic equation is 

The discriminant of this equation is given by;

where a=k, b=20, c=k
For rational solutions, the discriminant must be zero.

Simplify to get:

This implies that:


Take square root to get:



 
        
             
        
        
        
Answer:
There are 8 people on the train.
Step-by-step explanation:
20 - 15 = 5
5 + 3 = 8