Joint Frequency because of the fact that it "joins" one number from the column(up and down) and one from the row(side-by-side), hence the two-way table.
        
             
        
        
        
Step-by-step explanation:
distance must be given 
average speed is distance and time
 
        
             
        
        
        
Answer:
Train A = 299 tons Train B = 50 tons
Step-by-step explanation:
Train A = x 
Train B = y
x+y = 349
x= y +249
Plug in one equation into another
y+249+y= 349
Simplify
2y+249=349
Subtract 249 from both sides
2y=100
Divide both sides by 2
y=50
Plug it into the x equation to solve for x
x+50=349
-50 from both sides
x=299
 
        
             
        
        
        
Answer:
sorry bro but i suck at math 
Step-by-step explanation:
good luck tho =)
 
        
             
        
        
        
Answer:
1 and 3 are 47 degrees and 2 is 133 degrees