5x + 13 Hope this helps you
        
             
        
        
        
Multiply the first equation by -1
-3x-y=-4
2x+y=5
Add them up 
-x=1
So x=-1
And y=7 
So the first option is correct 
 
        
             
        
        
        
Answer:
The common ratio is -2
Next three terms are 18, -36, and 72
Step-by-step explanation:
The common ratio is -2 since each consecutive term is being multiplied by -2
The next three terms are -9(-2) = 18, 18(-2) = -36, and -36(-2) = 72
 
        
                    
             
        
        
        
Answer:
It is. Only you dont get a whole number.
Step-by-step explanation:
 
        
             
        
        
        
Two planes intersect at a line. Not a point.