If she rides her bike 18 km per hour 
then it will take 4 hours to travel 72 km (72÷18)
the answer is 4
        
             
        
        
        
- Let x be the percentage of p.
- Therefore, 
 
<u>Answer:</u>
<u> </u>
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Hope you could get an idea from here.
Doubt clarification - use comment section.
 
        
             
        
        
        
the correct answer would be 4 3/4
hope this helps!
lmk if you would like an explanation! :)
 
        
                    
             
        
        
        
2x²+7x+9x-2=38
2x²+16x-40=0
2(x²+8x-20)=0
2(x+10)(x-2)=0
x=-10 or x=2
if we let x=-10 we get negative lengths for some of the segments which is not allowed so discard it. for x=2, 
gh=22, hi=16, and gi=38