Answer:
<u><em>0-20</em></u>
Step-by-step explanation:
 
        
             
        
        
        
Answer:
80.95
Step-by-step explanation:
Percentage increase =  *100
 *100
=> (38-21)* 100/21 = 80.9523%
The answer round it to the nearest 100th = 80.95%
 
        
             
        
        
        
Answer:
i think your correct my bro
Step-by-step explanation:
 
        
             
        
        
        
Answer:
170 children
74 students
85 adults
Step-by-step explanation:
Given
Let:

For the capacity, we have:

For the tickets sold, we have:

Half as many as adults are children implies that:

Required
Solve for A, C and S
The equations to solve are:
 -- (1)
 -- (1)
 -- (2)
 -- (2)
 -- (3)
 -- (3)
Make C the subject in (3)

Substitute  in (1) and (2)
 in (1) and (2)
 -- (1)
 -- (1)


Make S the subject

 -- (2)
 -- (2)



Substitute 



Solve for A


Recall that: 


Recall that: 



Hence, the result is:



 
        
             
        
        
        
In order to solve this we need to get x by itself on one side.
We need o start by adding across the 4 so that we get:
x/3 = -7 + 4 = -3
We then need to multiply both sides by 3 to get a singular x:
x = -3 * 3 = -9