The answer is -8/15 because you need to cancel out the variables first
Answer:
4 miles
Step-by-step explanation:
In order to find how many miles the car will travel in 0.5 hours, we can set up a proportion.

We can now cross multiply to find the value of x.

So the car can travel 4 miles in 0.5 hours.
Hope this helped!
The factored form would be (3x-9)(x-1)
The picture should help a bit
Average rate of change of the function: 
Step-by-step explanation:
The average rate of change of a function f(x) can be calculated as:

where:
are the x-values of the interval taken into account to evaluate the rate of change of the function
are the values of the function at those points
In this problem, we have:

The function is
, so

So, the average rate of change in this interval is:

Learn more about rates of change:
brainly.com/question/4152194
brainly.com/question/12941985
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Firstly, we can look at our givens,
a = 17
b = 22
c = 30
And we are looking for m∠A
Is the Law of Cosines. Now we can solve for our unknown, m∠A. This will give us

Now we can substitute in our given variables.

Then we can plug this into our calculator which will give us
34.19185257 degrees
Now we just have to round to the nearest tenth
This means that the answer is 34.2 degrees