Respuesta :
					                   22.5 km divided by 5 hours  equals a constant speed of 4.5 km per hour. 
					                
					                
					             Answer:
4.5 = x
Step-by-step explanation:
Given:
22.5 = 5x
(we need to find out what x is)
22.5 / 5 = 4.5
meaning that the duck traveled at 4.5 kilometers per hour.
Check:
4.5 x 5 = 22.5
 
			                  