Answer:7.4 is the correct asnwer actually. I did it wrong. The formula is height times base divided by 2. So 3.7x4=14.8   14.8/2=7.4
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Answer: Yes, the set of real numbers is closed under addition.
Explanation:
Let x and y be two real numbers. Their sum x+y is some other real number. This is what it means when we say the set of real numbers is closed under addition. Taking any two numbers and adding them will get us some other real number.
There is no way to have x+y be nonreal while x,y are both real.
 
        
             
        
        
        
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idont Andre stand inglish can you transfer for Arabic plz
 
        
             
        
        
        
Answer:
Yes, Considering They Are all Negative, Or if Its Wrong then, It would Be No, Because They might Be Negitive but, They Done Count By the Same Number, My Answer Would be Yes.
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