## Algebra: A Combined Approach (4th Edition)

$26$
The distance between $(-1, 5)$ and $(3, 5)$ is 4. The distance between $(3, 5)$ and $(3, -4)$ is 9. The distance between $(3, -4)$ and $(-1, -4)$ is 4. The distance between $(-1, -4)$ and $(-1, 5)$ is 9. $4+9+4+9=26$