20/100 = 0.20
0.20 * 9 = 1.8 
9 - 1.8 = 7.2 
The sale price of the DVD is $7.20.
 
        
                    
             
        
        
        
Answer: 4m+-24n+3
This could be or you can write it like 4m-24n+3. And that’s the answer depends on what your doing. And you can’t simply anymore so that’s the best answer.
 
        
                    
             
        
        
        
Answer:
The height is 20 cm.
Step-by-step explanation:
First, we have to know that the volume formula is V = πr²h and the base area of cylinder is a circle. So we can let πr² be 77 cm² . Then we have to substitute the following values into the formula :



Let πr² be 77,
Let v be 1540,




 
        
             
        
        
        
Answer:
the previous population was 62,000.
Step-by-step explanation:
The current population of a city = 83,700
The population of a city has increased by 35% since it was last measured.
We have to calculate the previous population before increasing 35%.
Let the previous population be p
p +(35% × p) = 83,700
p + 0.35p = 83,700
1.35p = 83,700
p =  
p = 62,000
Therefore, the previous population was 62,000.
 
        
                    
             
        
        
        
Jamal would bike further in