Answer:
1 cup of sugar per 2.5 cups of flour.
2.5 cups of flower per 1 cup of sugar.
17.5 cups of flower is used with 7 cups of sugar. 
1.6 cups of sugar is used with 6 cups of flour.
Step-by-step explanation:
 
        
             
        
        
        
Multiply all of the numbers together: 5 x 2 x 8 = 10 x 8 = 80 ways 
 
        
             
        
        
        
Dont ask me why...I cant really explain it...but if u have 1 repeating decimal, u put it over 9. If u have 2 repeating decimals, u put it over 99....3 repeating decimals, put it over 999.
Examples :
0.7 (repeating) = 7/9
0.27 (repeating) = 27/99 when simplified = 3/11 <===
0.444 (repeating = 444/999 
        
                    
             
        
        
        
One way is using the rules.
        
                    
             
        
        
        
Answer:
It can be solved in many forms 
one by replacing each point to see which one satisfy the equation or by using quadratic formula
so the right answer is the fourth one