Answer:
Step-by-step explanation:
Δy =-4-1 = -5
Δx =-8-(-6) = -2
distance =  √((Δx)^2+(Δy)^2) = √(4+25) = √29
 
        
                    
             
        
        
        
Trains depart after every 4 minutes.
Total time train takes to complete a circuit= 24 minutes
Evan sets off at 8:30 am, so  he will be back at 8:54 am.
So time of trains coming in opposite direction:
8: 34 am
8:38 am
8:42 am
8:46 am
and 8:50 am
5 trains coming in opposite directions.
Now the trains started at 8:06 am from the stations are:
8:06 am
8:10 am
8:14 am
8:18 am
8:22 am
and 8:26 am. 
So there are 6 trains started the circuit at 8:06 am.
Now total number of trains=6+5=11 trains
Answer: 11 trains will pass on complete circuit.
        
             
        
        
        
Answer: 28/32 but converted its 7/8. My work is kinda messy sorry. But this is my work.
 
        
        
        
Straight lines will always add up to 180 degrees, so the angle that is missing here is supplementary to the other angle(adds up with the other angle to get 180) so we take 79 away from 180 and get 101 degrees
        
                    
             
        
        
        
Answer:
6:8 and 9:12
Step-by-step explanation:
As long as you do the same thing to both parts of the ratio, it's the same ratio