Someone please help me out on this problem

+=9

Step-by-step explanation:

the equation for graphed circles centered at (0, 0) is

+=

and 3 is r (the radius)

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it