<span>-3(5+8r)=33-8r
-15 - 24r = 33 - 8r
-15 - 33 = - 8r + 24r
-48 = 16r
-48/16 = r
-3 = r
r = -3</span>
        
                    
             
        
        
        
Da answer is cCbecause it is
        
             
        
        
        
Answer:

Step-by-step explanation:
Given


Required
Determine the difference between the points
The difference is calculated as follows:



 
        
             
        
        
        
12.7  
Using the Pythagorean theorem, you can easily calculate the length of BC. 
So: 
BC = sqrt(12^2 - 6^2) = sqrt(144 - 36) = sqrt(108) = 10.39230485  
Now consider triangle BCD. You know all three angles and one side. Using the law of sines you know that ratio of the sine of each angle over the opposite side is constant. So: 
BC/sin(55) = CD/sin(90) 
BC/sin(55) = CD/sin(90) 
sin(90)BC/sin(55) = CD 
1*BC/sin(55) = CD 
BC/sin(55) = CD 
10.39230485/0.819152044 = CD 
12.68666167 = CD 
12.7 = CD
        
             
        
        
        
Answer:
x = 3
Step-by-step explanation:
vertical line mean x always constant