Answer:
True
Step-by-step explanation:
 
        
             
        
        
        
Answer:
Helen requires 15$ more to buy the three books.
Step-by-step explanation:
We are given the following in the question:
Cost of dictionary = $7 
Cost of dinosaur book = $16
Cost of cook book = $17
Helen's allowance = $25
Total cost of three books = 

Extra money required to buy three books = 

Thus, Helen requires 15$ more to buy the three books.
 
        
             
        
        
        
Answer:
They are b and c.
Step-by-step explanation:
Let's simplify each expression:
 a. b+2 (b+2b)
= b + 2b + 4b = 7b.
b.  3b + b = 4b.
c. 2(2b) = 2 * 2b = 4b.
 
        
                    
             
        
        
        
the americans scored twice in the last period although the soviet team dominated second period, after that the americans finally took the lead
(this is english not math change your question when you have to do this again)