9514 1404 393
Answer:
   $43.75
Step-by-step explanation:
The amount of the markup is ...
   $25 × 0.75 = $18.75
The final cost to the customer is ...
   selling price = purchase price + markup
   = $25.00 + 18.75 = $43.75
They charge customers $43.75 for a videogame.
 
        
             
        
        
        
Answer:
The answer is letter D.
Step-by-step explanation:
320/80
=4
 
        
             
        
        
        
R = speed in still water
r + c = speed with current
r - c = speed against current
3.5(r + c) = 70
r + c = 20
c = 20 - r
4(r + c) = distance from pier to pier
5(r - c) = distance from pier to pier
4(r + c) = 5(r - c)
4(r + 20 - r) = 5(r - 20 + r)
80 = 10r - 100
180 = 10r
18 = r
The speed in still water is 18 km/hour
        
             
        
        
        
I could be wrong, but I think it could be D, 18.5.