Answer:
Explanation:
y2-y1 over x2-x1
-1+1 over 2-4
0/-2= m=0
y=mx+b
-1=0(2)+b
-1=0+b
b=undefined
so basically the equation is undefined so you can say x=to whatever number
 
        
             
        
        
        
Hi there! The answer is C. barbarian raids.
Local farmers were unable to feed the Roman population during the fall of the Roman Empire because of barbarian raids. Between the 4th and 5th century, large groups of people entered the Roman Empire, which caused state failure inside the Empire. This period is called the Migration Period and preluded the Middle Ages.
        
             
        
        
        
The first blank is Harry Truman, who was President of the United States after FDR. 
The second blank is the Soviets, since the Cold War was mainly characterised by the stalemate between the Communist superpower USSR and the democratic superpower US.
        
                    
             
        
        
        
Answer:
plate boundaries
Explanation:
Volcanoes and earthquakes are most likely to form along plate boundaries.
Earthquakes:
An earthquake is generated when two plates move relative to each other. The earthquake itself, is the movement felt on the surface caused by the movement of the tectonic plates at their boundaries. There are a few different types of plate boundaries, NOAA does a great job giving a brief description of each here:
http://oceanexplorer.noaa.gov/facts/plate-boundaries.html
 
        
             
        
        
        
Answer:
Tropic of Capricorn
Explanation:
The Tropic of Capricorn which is also known as the Southern tropic is the furthest direction south of the Equator where the Sun can be located vertically overhead as it the location of the subsolar point at the southern solstice. In the middle of June, the Tropic of Capricorn reaches a position of an angle of 90° below the horizon at midnight 
The latitude of the Tropic of Capricorn is 23°26'11.8'' south of the Equator, while the location of the Tropic of Capricorn is shifting northward at a rate of 15 meters annually.