Answer:
The answer is C.
Step-by-step explanation:
Just go to Desmos.com and plug it in.
 
        
                    
             
        
        
        
102+28=130 180-130=50, answer is 50°
 
        
                    
             
        
        
        
Answer:
1. x=6
2. x=9
Step-by-step explanation:
1. 

2. 

<u>Written Explanation: </u>
1. 
-2x(3x+9)=-54 
-6x-`8=54 (Distributive property) 
Add 18 to both sides
-6x=-36
Divide both sides by -6 (negative divided by a negative equals a positive)
x=6
2. 
2(3x+4)-3x=35
6x+8-3x=35 (distributive property)
3x+8=35 (combine Iike terms and then subtract them 6x-3x=3x)
Subtract 8 from both sides
3x=27
Divide both sides by 3 
x=9
 
        
             
        
        
        
You need to know the slope and the y intercept