Answer:
Distance formula is below
Step-by-step explanation:
 
        
                    
             
        
        
        
The answer is 9.
Hope I helped
        
                    
             
        
        
        
Answer:
-8d+13
Step-by-step explanation:
Add and Multiply all of the numbers without variables:
3x4+1
Use PEMDAS to solve (Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction):
3x4=12
12+1=13
Now you have your answer:
-8d+13
 
        
                    
             
        
        
        
Answer:
missing angle <60 and side lengths 5, 5
Step-by-step explanation:
we understand from the given information that  the triangle in question is a special right triangle
and since this is a special triangle the side lengths follows : 
the side length that sees <90 is represented by 2x
the side length that sees <60 is represented by x
and the side length that sees <30 is represented by x
2x = 10 so x = 5 and  x = 5
 = 5