Find the center and radius of the circle with equation (x + 2) + (y + 10) = 4.

The answer would be:

center (-2, - 10)

radius = 2

The formula for circle equation would be:

(x - x1) + (y-y1) = r^2

Where

x1 = the x coordinate of the center

y1 = the y coordinate of the center

r = radius of circle

From the equation, you can determine that

x-x1 = x + 2

-x1 = 2

x1=-2

y-y1 = y+10

-y1 = 10

y1 = - 10

The centre would be (-2, - 10)

The radius would be:

r^2=4

r=√4 = 2