Hey!
First change all the fractions so that they have a common denominator: 40



Now order them:

Good luck and hope this helps! :)
 
        
             
        
        
        
Use the formula a^2+b^2=c^ which is 7.21
        
                    
             
        
        
        
Start with

Add 2x to both sides:

Subtract 21 from both sides:

Divide both sides by 5. Since it is positive, we don't have to change the inequality sign:

So, the answer is 
 
        
             
        
        
        
Answer:
(a) 11.
(b) 5.
Step-by-step explanation:
(a)√124:
11*11 = 121 so an estimate is 11.
(b) ∛124
5*5*5 = 125
So an estimate is 5.
 
        
             
        
        
        
Answer:
8/3 or 2.6666
Step-by-step explanation:
You have divided the first equation by 3 -- all except the 8. So you must divide the 8 by 3 giving you 8/3 which is 2 2/3 or 2.66666 
Answer (x - 2y) = 8/3