Answer: First equation: 3
Second equation: 6
Step-by-step explanation:
First equation:
The standard equation for a circle is (x-h)^2+(y-k)^2=r^2, where (h,k) is the vertex of the circle and r is the radius
To find the radius, set r^2=9, since 9 is taking the place of r^2.
Square root each side, and only positive values are taken for a radius, so the radius is 3.
Second equation:
Using the same logic, we can find the radius for the second one.
The radius is r^2=36(remember that r^2 is taking place of 36)
Take the square root of both sides(only +), so the radius for the second problem is 6.
>:)
