Given:
Either has a school certificate or diploma or even both = 20 people
Having school certificates = 14
Having diplomas = 11
To find:
The number of people who have a school certificate only.
Solution:
Let A be the set of people who have school certificates and B be the set of people who have diplomas.
According to the given information, we have



We know that,



Subtract both sides by 25.



We need to find the number of people who have a school certificate only, i.e. 
.



Therefore, 9 people have a school certificate only.
 
        
             
        
        
        
Answer:
2.6666
Step-by-step explanation:
hypotenuse is c^2 so you square 4 to get 16 and then you divide it by 6 to 2.666 so that is the answer for the other leg
 
        
             
        
        
        
Answer:
3000 people live in brainesville
Step-by-step explanation:
Population of brainville =2000
Grow rate of population per year =10%
10% of population =2000*10/100=200
Grow rate of 5 year=200*5=1000
After 5 year population of brainville is=2000+1000=3000
 
        
             
        
        
        
Answer:
equation:x*1/5=9/20
answer=9/4
Step-by-step explanation:
9/20÷1/5=9/20×5/1 in word form you multiply 9/20 by its reciprocal.
first you want to simplify and change 9/20 to 9/4 and change 5/1 to 1/1 and then multiply to get 9/4