34 = q + n
6.1 = .25q + .05n
-1.7 = -.05q - .05n
6.1 = .25q + .05n
4.4 = .2q 
q = 22
22 of the coins are quarters.
        
             
        
        
        
Answer:
x=3
Step-by-step explanation:
f(x) = 2^x
Let f(x) =8
8 = 2^x
Rewriting 8 as 2^3
2^3 = 2^x
The bases are the same so the exponents are the same
3=x
 
        
                    
             
        
        
        
Equation:5000(1+0.04)^7
Answer: approximately 6579.65 or 6580