Here, z = kx
k = z/x
k = 228/12
k = 19
So, when x = 18, 
z = 19 * 18
z = 342
In short, Your Answer would be: 342
Hope this helps!
        
             
        
        
        
Step-by-step explanation:
hope it helps first find one number and then multiply one number by 2
 
        
             
        
        
        
The students will earn $180 by washing cars for 9 hours.
In 3 hours the students will earn...
$5 x 12 = $60
5 dollars x 12 cars = 60 dollars
So in 3 hours the group of students will earn $60
In 9 hours the students will earn...
$60 x 3 = $180
Since the students will earn $60 per every 3 hours, you multiply $60 with 3 because if you divide 9 hours by 3 hours you will get 3. The answer you get by multiplying 60 by 3 is 180. Therefore the students can earn $180 from washing cars.
I hope this helps!
 
        
             
        
        
        
Check : 
brainly.com/question/5023362 To see what are the factors use, we write each of the numbers, as product of prime factors, as shown in the picture
As we can see, the 4 factors used to produce the numbers in the list are {2, 3, 5, 7}
Answer:  {2, 3, 5, 7}
 
        
        
        
Answer:

Step-by-step explanation:
Given
Let x represent the number of tickets, and p the charges 

A reduction of 50c gives an increment of 50 tickets.
This gives:
 ----
 ---- 

Required
Determine the demand function
First, calculate the slope:




So, the equation is:




Hence, the function is:
