Hello, 
to find the total cost (c) of the colored strips we have to multiply the number of strips (n) by the cost of each color strip (99¢), that as an algebraic function is:

 [¢]
Now, if we use 3 solid color strips, that means that we use 4 patterned strips, so:
 Answer: c=n*99   and   Cost per curtain= $7.97
Answer: c=n*99   and   Cost per curtain= $7.97
 
        
        
        
Answer would be 140 why does my answer need to be 20 words long ugh
        
                    
             
        
        
        
Answer:
true
Step-by-step explanation:
(-8) + 9=1
9+(-8)=9-8=1
 
        
                    
             
        
        
        
Answer:
D
-3 * (-4) matches, as well as the powers (I guess you wanted to communicate that these are powers, but it would also be correct if these where factors)
 
        
             
        
        
        
Okay, then ask an answer!