Answer:
12
Step-by-step explanation:
3 x 4 = 12
 
        
             
        
        
        
Answer:
-
Step-by-step explanation:
Answer is - 1 , but can't show work with smart phone. Don't own computer. 
Use my head for most numbers. Sorry
 
        
             
        
        
        
Factor
b(b+12)=0
set to zero
b=0
b+12=0
b=-12
b=0 or -12
written as this way
b=-12,0
        
             
        
        
        
Answer: <DEF & <JKL 
Step-by-step explanation:
they equal 90 degrees 
complementary angles equal 90 degrees 
 
        
                    
             
        
        
        
Answer:
3-is 85
2- is 95
4-95
Step-by-step explanation:
for 1 is 85
85-180=95