Answer:
 18.6x + 3.6
Explanation:
A rocket scientist needs to find the overall thrust of a new rocket design. The rocket has two stages: Stage A and Stage B. Stage A's thrust is defined by the expression 11.2x + 6.4 and Stage B's thrust is defined by the expression 7.4x − 2.9.
Solution:
The rocket thrust is the force that helps in moving the rocket through air and through space. For a multistage rocket, the overall thrust is gotten by summing all the thrust experienced in each of the stages. 
Hence the overall thrust for this problem is given by the equation:
Overall thrust = Stage A thrust + stage B thrust
Overall thrust = (11.2x + 6.4) + (7.4x − 2.9)
Overall thrust = 18.6x + 3.6
 
        
             
        
        
        
Answer:
B.
Explanation:
The placenta is a flattened circular organ in the uterus of pregnant eutherian mammals, nourishing and maintaining the fetus through the umbilical cord.
 
        
                    
             
        
        
        
Answer:
I suggests that genetics, abuse and other factors contribute to the development of obsessive-compulsive, narcissistic or other personality disorders. some believed that people with personality disorders were just lazy or even evil.
But at the same time this is just a thought
 
        
             
        
        
        
Answer:
<em>22.5 to 275 g/l</em>
Explanation:
Sucrase is an enzyme that hydrolyses sucrose into glucose and fructose.  The main function of the enzyme to speed up the biological reaction. As sucrose concentration increased, the reaction will also speed up as long as there is a substrate available to bind. Once all substrate is bound, the reaction will no longer speed up. The reaction will be in constant phase.
At 2.5 to 7.5 g/l sucrase concentration, the reaction will be in early phase. It will give more activity at 22.5 to 27.5 when reaction get stable.