Write an equation of a circle with the center (-5,-4) and radius 6.

The general equation for a circle is

(x-a)^2 + (y-b)^2 = r^2, where r is the radius of the circle and (a,b) are the (x,y) coordinates of the center.

Make the appropriate substitutions and you will have the equation.

In this case, the center of the circle is (-5,-4) and the radius is 6.

Substituting the values in the general equation of a circle, we have:

(x - (-5))^2 + (y - (-4))^2 = 6^2

Simplifying this equation, we get:

(x + 5)^2 + (y + 4)^2 = 36

Therefore, the equation of the circle with center (-5,-4) and radius 6 is (x + 5)^2 + (y + 4)^2 = 36.