Answer: 
Step-by-step explanation:
Let us first represent the ratio.
3
Now we need to convert 3
into a improper fraction.

Now it is in its simplest form.
The final answer is 
Is the answer a, b, c, or d? I think it is a.
Answer:
7: 45
Step-by-step explanation:
8:05
Subtract 20 minutes
8:05
- 20
-------------
We need to borrow minutes 1 hour = 60 minutes
7:65
- 20
-------------
7 :45
Answer:
0
Step-by-step explanation:
Note that we start at (0, -4) and end at (7, -4). Thus, the net change in y over the interval [0, 7] is 0, and the average rate of change of f(x) over that interval is thus
0
--------- = 0
7