The value of x is 21 because:
69 + x = 90
69 + 21 = 90
The rate of change of g is given by its gradient, which is 3.
The average rate of change of f in [0, 2] can be calculated by taking:

So, the average rate of change of f is less than the average rate of change of g in the interval [0, 2].
Statement 2 is correct.
Answer:
<em>The solution will be:
</em>
Step-by-step explanation:
The given inequality is: 
First we will multiply all sides by 2 for eliminating that
in the middle part. So.........

Now, we need to subtract 16 from all sides. So, we will get........

Then, we will divide all sides by 4 for getting
alone in the middle part. So.......

Thus, the solution will be: 
1 inch = 48 miles. Therefore, 2.5 inches = 2.5X48= 120miles