Answer:
Hope this helped :)
Step-by-step explanation:
Convection flows structure in light of the fact that a warmed liquid grows, getting less thick. The less-thick warmed liquid ascents from the warmth source. ... For example, a hot radiator warms the air promptly around it. The air ascends toward the roof, pulling cooler air down from the roof into the radiator to be warmed.
 
        
             
        
        
        
Answer:
x=3
Step-by-step explanation:
2x+3=9
2x=6
x=3
 
        
             
        
        
        
Answer: It would be 8+4z  because you can't add a variable.