Answer:
25/4
Step-by-step explanation:
divide the 1/2 and 2/25 and thats how you get the answer:
25/4
 
        
                    
             
        
        
        
Let
n-------> the number of nickels
q------> the number of quarters
we know that

so
 ----> equation A
 ----> equation A
 ----> equation B
 ----> equation B
substitute equation B in equation A
![0.05n+0.25[3n]=1.60](https://tex.z-dn.net/?f=0.05n%2B0.25%5B3n%5D%3D1.60)



Find the value of q

therefore
<u>The answer part a) is</u>
the number of nickels are   and the number of quarters are
  and the number of quarters are 
<u>the answer Part b) is</u>
The expressions that represents the number of quarters is
 
 
 
        
                    
             
        
        
        
Answer:
20
Step-by-step explanation:
4 * 1 = 4        5 * 1 = 5
4 * 2 = 8        5 * 2 = 10
4* 3 = 12        5 * 3 = 15
4 * 4 = 16       5 * 4 = 20
4 * 5 = 20
they both go into 20 equally. there is no number lower than 20 that they both go into
 
        
             
        
        
        
500=4πr^2. first divide 500 from four which will equal 125, then divide 125 with π and it will equal 39.788 . finally √39.788. the answer will be r=6.3 or 6