Answer:
x ≈ -0.90, y ≈ 2.31
x ≈ 1.40, y ≈ 9.19
Step-by-step explanation:
Easiest and fastest way to do this is to graph the systems of equations and trace where the graphs intersect:
 
        
             
        
        
        
Exact form: 
22/13
Mixed number:
1 9/13
        
             
        
        
        
Answer:
4
Step-by-step explanation:
 
        
                    
             
        
        
        
For perfect solution we need to have :-  8 colves   in 500ml    solution
500   ml     has   8 cloves 
1 ml             has     8 / 500 cloves
100ml         has   8 / 500  * 100  =    8/5  = 1.6 cloves 
Raphael's mixture  
     900 ml  has 12 cloves 
       1 ml     has   12 / 900 cloves
    100 ml has   12 / 900 *  100   =    12 / 9  =   1.33 cloves
so concentration of garlic in 100 ml solution of Raphael's solution is less than Emily's solution    so it is not garlicky enough.     ( option B)