Step 2: <span>Inverse Property of Addition
</span><span>any number added to its opposite will equal zero
</span>in this case + 20 - 20 = 0
answer
Inverse Property of Addition
        
                    
             
        
        
        
Here ya go. Hope this helps. Have a great day
 
        
        
        
Answer:
307.5 
Step-by-step explanation:
He drove 123 miles in 2 hours. If you go 100 miles in 2 hours that means you went 50 miles in one hour right? Using the same logic we can convert 123 miles in 2 hours to 61.5 miles per hour and then multiply it by 5. 
 
        
             
        
        
        
Answer:
Hello I am not 100% on my answer but I would assume that X is 2.5 and Y is 6.5
Hope This Helps! please correct me if i am wrong 
 
        
             
        
        
        
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Step-by-step explanation:
it would at LEAST be like around 20-30 because a 0 can drop something FAST