Respuesta :

18 is the correct answer

Answer: 18 hours

Step-by-step explanation:

Takes 16 hours = 8 miles

? = 9 miles

Let the unknown number of hours be represented with Z. Cross multiplying we have....

16 X 9 = Z X 8

8Z = 144

Z = 144/8

Z = 18

It takes 18 hours to hike 9 miles