They are called vertical angles because the definition of vertical is: <span>in a direction, or having an alignment, such that the top is directly above the bottom. The "angles opposite each other when two lines cross" match the definition.</span>
        
             
        
        
        
The only thing you need to do is divide 56 by -7. You know the d must be a negative number because negative x negative= positive. So 56 / -7 is -8.
        
             
        
        
        
I believe the answer is D
        
             
        
        
        
Hello!
Answer:
x=10/3
Step-by-step explanation:
First you want start by adding 4 to both sides
6x-4+4=16+4
6x=20
Then divide 6 to both sides,
6x/6=20/6 
x= 10/3
Hope this helps! :)
 
        
             
        
        
        
Answer: 5/4 = 1 2/8
Step-by-step explanation: That's the answer