Answer:
60 degrees. 
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:o
Step-by-step explanation:
 
        
             
        
        
        
 Answer:
92
Step-by-step explanation:
angle a and b add up to 180 degrees 
4x-20+2x+8=180
add like terms 
6x+12=180
x=28
then substitute to get 92
 
        
             
        
        
        
Answer:
D)  x² -x - 10  =0
Step-by-step explanation:
Given that 
              
L.C.M
          
         
           
     ⇒ 
 
    ⇒ 9 x + 54 = 9 x² - 36
   ⇒ 9 x² - 36 - 9x - 54 =0
 ⇒ 9 x²  - 9x - 90 =0
 ⇒ 9(x² -x - 10 ) =0
 ⇒ x² -x - 10  =0
 
        
             
        
        
        
Use an app called socratic