<h3>we can make the below formulas with this information:</h3>

<h3>hope it helped you :-)</h3>
Which question do you need help with
Okay, first, given the equation, we need to find out what the radius of the circle is. Let us state the general equation of a circle:

Where

is the centre of the circle. In this case, we don't need to know the centre. Just the radius.
Let us start by converting the equation into standard for, which I typed above. Divide both sides by 81.

Great! We now know the radius of the circle. It is

because it is the bottom fraction. Now we know that the radius is 9.
So now lets input this into the area of circle formula:
Now we insert our radius.
You can convert that into a decimal if you wish.
Hope this helped!
~Cam943, Moderator
Answer:
The slope is 2
Step-by-step explanation:
There's a theorem:
So lets put that into our equation.
which also equals
Then, all we must do is divide the nominator from the denominator.
6/3 = 2
Therefore, the slope is 2!
I hope this helps!
Answer:
400
Step-by-step explanation:
You know that 80 is 20% of whatever number you are trying to get, and you want 100% of that number, so times 80 by 5 (20% times 5) to get your number.