Answer:
Center: 
Radius: 
Step-by-step explanation:
It is necessary to remember that the Equation of the circle in Center-radius form, is:

Where the center of the circle is at the point (h, k) and the radius is "r".
Then, given the following equation of the circle:

We can notice that it is written in Center-radius form. Then we can identify that:

Therefore the center is:

And the radius is:

Answer:
46.5
Step-by-step explanation:
convert 15 1/2 to 15.5
multiply it by 3 because it moves 15.5 milea every 1/3 of an hour
Answer:
b=-18
Step-by-step explanation:
If a line that passes through the point
and it has slope
, the equation of the line is:

Answer:
dollars per t-shirt
Step-by-step explanation:
<em>Read the problem and write your equation while following along with it</em>
We have 8 t-shirts
Lets 8 t-shirts be represented by 8t
So for our equation we will place and 
<h3>Our equation:

</h3><h3 />
Now it says we have a coupon that subtracts 4 dollars from our total
<h3>Our equation:

</h3><h3 />
The final part to add to our equation says that our total before tax was 36 dollars
<h3>So here is our equation:

</h3><h3 />
<em>add </em>
<em> to both sides</em>

<em>Divide both sides by</em> 
dollars per t-shirt
-Side note, make sure to spell your question right. It was a tad bit confusing to read at the start.
-Brainliest please :)
Answer:
i have made it in above picture