Answer:
3/2 mph
Step-by-step explanation:
= 
cross-multiply: 8r = 12
r = 12/8 or 1.5 mph
2/4? 4/8? .5? All mean 1/2. Also one half.
Answer ; 10x - 20
Explanation; Multiply each term in the parenthesis by 10. Then multiply the numbers, and you get your answer.
We can see that
lies just before 0,
lies between 2 and 3m and
lies between 4 and 5. So, we have

In particular, this implies that

So, the correct order would be
