Answer:
a. Center: (-15, 9), Radius: 5
Step-by-step explanation:
Equation of a circle:
The equation of a circle of center
and radius r is given by:

In this question, we have that:

Comparing both equations:


And


The center is
.
For the radius:


The correct answer is given by option a.
We have been given that the Walters bought a house and calculated they would pay 28% of their combined income of $5436.68 toward their monthly mortgage payment on the house.
To find the amount of monthly mortgage payment, we will find 28% of combined income.




Therefore, the Walters will pay approximately
for their monthly mortgage payment.