Two circles are concentric if they have the same center. On a coordinate plane, a circle has center (4, 6) and has a radius of 2 units. Which equation represents a circle that is concentric with the circle shown but has a radius that is twice as large?

Nancy walks 5 blocks to the right, 3 blocks down, 7 blocks to the left, and 1 block up. each square's side length is 1 block. what are the coordinates of her new position? starting coordinates are (2, -3) a. (1, 5) b. (0, -5) c. (-3, 0) d. (-6, -3) e. (-4,-4)