Thwre are 28 clients who don not play any of the instrument using the principle of Venn distribution. 
<u>Using a Venn diagram analogy</u> : 
- Total number of client, U = 108
- Piano, P = 42 
- Guitar, G = 51
- Piano and Guitar, (PnG) = 13 
- None =? 
<u>From the information given</u> :
- P only = 42 - 13 = 29
- G only = 51 - 13 = 38
<u>The total number of clients can be related thus</u> : 
- Total = P only + G only + PnG + None 
108 = 29 + 38 + 13 + None 
108 = 80 + None 
None = 108 - 80
None = 28
Therefore, the number of clients who do not play any of the instruments is 28
Learn more :brainly.com/question/12570490
 
        
             
        
        
        
1st gift shop:
120/4 = 30 cents each
180/6 = 30 cents each
390/13 = 30 cents each
 
2nd gift shop:
204/7 = 29.14 cents each
192/8 = 24 cents each
270 /9 = 30 cents each
360/10 = 36 cents each
 so if both gift shops have a fixed price then the 9 post cards would be the answer since it matches 30 each like the 1st gift store
 
        
             
        
        
        
Answer:
b) y = f(x - 7) - 3
Step-by-step explanation:
it adds  if its goes to the right and subtracts if it goes to the left 
And when it goes down then it will also decrease in number.
that is why b) y = f(x - 7) - 3 is the correct answer to put