Im thinking the 3rd one . I’m not 100 percent sure.
        
             
        
        
        
Answer:
(-2, -3)
Step-by-step explanation:
solutions are all the points where the line intersects
 
        
             
        
        
        
Answer:
-1/8
Step-by-step explanation:
Perpendicular slopes are negative reciprocals 
The slope of y=8x+5 is 8, because it is in slope intercept form: y=mx+b form, where m is the slope.
Negative: 
8/1--> -8/1 
Reciprocal: 
Flip the numerator and denominator 
-8/1--> -1/8 
So, the perpendicular slope of 8 is -1/8
 
        
                    
             
        
        
        
Answer:
-2 =m
Step-by-step explanation:
–15 = 4m – 7
Add 7 to each side
–15+7 = 4m – 7+7
-8 = 4m
Divide each side by 4
-8/4 = 4m/4
-2 =m