I think it is b but no positive
        
             
        
        
        
22 quarters= $5.50
10 dimes= $1.00
$5.50 + $1.00 = $6.50 
I just did trial and error. I started with 20 quarters and made changes until it worked. 
        
             
        
        
        
Answer:
y=(-4/5)x+4
Step-by-step explanation:
4x+5y=20
5y=-4x+20
y=(-4/5)x+4
 
        
                    
             
        
        
        
The decimal approximations are:
The square root of 5 is about 2.2
The square root of 8 is about 2.8
pi is about 3.14
2 square roots of 5 are about 4.4
The numbers are also placed in order from least to greatest.
        
             
        
        
        
Yes
hope this is understandably sure right easy for you