Answer:
21
Step-by-step explanation:
30 - 9 +3 
30 - 12
18
18 - 12=4
       12/4 = -3
18 - -3 
21
 
        
             
        
        
        
Answer:
toooook teaehes
Step-by-step explanation:
sedmee endm the worlds nssssssssssssss
 
        
             
        
        
        
Answer:
-7v² - 57v - 2
Step-by-step explanation:
-7v² - 49v - 2 - 8v
-7v² - 57v - 2
 
        
             
        
        
        
Answer:
x= 55
Step-by-step explanation:
The  two angles add to 180 degrees since they form a straight line
2x+70 =180
Subtract 70 from each side
2x+70-70=180-70
2x= 110
Divide by 2
2x/2 = 110/2
x= 55
 
        
                    
             
        
        
        
Answer:
10
Step-by-step explanation: