Answer:
e = 56
Step-by-step explanation:
Use cross multiplication.
28 * 14 = 7e
Simplify 
392 = 7e
Divide each side by 7 
e = 56.
 
        
                    
             
        
        
        
Step-by-step explanation:
1.solution
=2a+5a
=7a
2.solution
=12x-3x
=9x
3.solution
=3p+2p-p
=5p-p
=4p
Hope it helps you.
 
        
                    
             
        
        
        
Answer:
Use photo math, it will explain all the steps
 
        
             
        
        
        
Answer:
Pie chart
Step-by-step explanation:
Given that a  professor has kept records on grades that students have earned in his class
He wants to examine the percentage of students earning the grades A, B, C, D, and F during the most recent term, 
We have to find which kind of plot could he make
 Box plot gives comparison for interval of scores this is to some extent helpful to find out the percentage of students getting a range of scores
Timeplot is irrelevant here.  Dot plot will not be of much use.  
Histogram is to some extent useful as box plot
But the best one is pie chart giving easy visual comparison for various grades A, B,C,D,E and F