Answer:
21
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
x<3
Step-by-step explanation:
add 5 to 16. then divide 7 from 21. the sign flips with inequalities involving multiplication and/or division
 
        
             
        
        
        
Answer:
180-43
Step-by-step explanation:
43 and x are supplementary which means they both should equal 180
 
        
                    
             
        
        
        
3(1)+4<span>≥ 13
7</span><span>≥ 13 
No
3(2.5)+4</span><span>≥ 13
11.5</span><span>≥ 13
No
3(3)+4</span><span>≥ 13
13</span><span>≥ 13
Yes
{3, 4.5, 5}</span>
        
                    
             
        
        
        
So 1 hour= 60 minutes
60+25= 85 minutes
Now we should subtract the 42
85-42=43