Check the attached file for the answer.
 
        
        
        
Answer:
x = 5.4
Step-by-step explanation:
4/3 = 0.75
7.2*0.75 = 5.4
 
        
             
        
        
        
Answer:
4 Student is 20% of 20 students
Step-by-step explanation:
if 4 = 20% then 1 = 5% to get a hundred percent then you need to multiply by 20
so 20
4 Student is 20% of 20 students
 
        
                    
             
        
        
        
Answer:
D.134
Step-by-step explanation:
 
        
             
        
        
        
Distribute the x3 to each number. The coefficient stays the same but add exponent (3) onto each x. Final answer is: x to the seventh power plus 8X to the sixth power plus 2X to the fifth power +18 X to the fourth power +9x the third power