Answer:
Step-by-step explanation:
 
        
             
        
        
        
21x+1+14x+4=180
35x+5=180
35x=175
X=5
21(5)+1
105+1
Answer 
        
             
        
        
        
Answer:
The answer to your question is 25%
Step-by-step explanation:
Data
Initial price = $2.00
Final price = $2.50
First we subtract the final price to the inicial price 
               increment = 2.50 - 2.00
                                 = $0.50    It's the amount that the school increases to the community members
             Now we use a rule of three to find the percent
                  $2.00 ----------------------  100%
                  $0.50  ---------------------    x
x = 0.50 x 100/2 = 50/2 = 25%           
 
        
             
        
        
        
 why isn't there a sig n between the 3(x+5)2-4