C . Two acute and two obtuse angeld
        
                    
             
        
        
        
67+52+x=180
119+x=180
x=61
hope this helps!
the equation to be used would be x=180-(67+52)
        
             
        
        
        
Answer:
First - y=-2x+3
Second - y=-7+3
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
d=4 miles=4×1760 yards=7040 yards=7040×3 ft
number of lights=21120 ft
number of lights=21120/145 +1≈145.7+1=146+1=147 lights