Answer:

Step-by-step explanation:
The cost is given for <em>1 sweatshirt</em>. To find the cost of 15 sweatshirts, we need to multiply the expression by 15. Let's do this:

This is the expression that represents the cost of 15 sweatshirts.
 
        
             
        
        
        
Answer:
x= 5 ........................ .......
 
        
             
        
        
        
Answer:
x>11
11,∞
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
n and d are the number of nickels and dimes, respectively.
"there are 20 coins"
n+d = 20
d = 20-n
"total value is $1.40"
0.05n + 0.10d = 1.40
0.05n + 0.10(20-n) = 1.40
-0.05n + 2 = 1.40
0.05n = 0.6
n = 12
d = 20-m = 8
 
        
             
        
        
        
Answer:
1291.5km
Step-by-step explanation:
12.3*105=1291.5km