Answer: 6.79
Step-by-step explanation:
Multiplying by 10 allows you to move the decimal to the right by one place value.
 
        
             
        
        
        
The number is 20. Work in picture if you want it or want justification of steps:)
 
        
        
        
7 + 4 + f^2 - 5f + 2 = 13 + 3^2 - 5(3) = 13 + 9 + 15 = 28 + 9 = 37
        
                    
             
        
        
        
The blank would be 50% because there are only 2 options it can land on and they are both even
        
             
        
        
        
2(l+w)=16
l+w=16:2
l+w=8
for l>w
l=7, w=1
l=6, w=2
l=5, w=3