To find the distance between points A (-5, 5) and B (5, 12), we use the distance formula:
\[ d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2} \]
Here, \( (x_1, y_1) = (-5, 5) \) and \( (x_2, y_2) = (5, 12) \).
Substituting the coordinates into the formula:
\[ d = \sqrt{(5 - (-5))^2 + (12 - 5)^2} \]
This simplifies to:
\[ d = \sqrt{(5 + 5)^2 + (12 - 5)^2} \] \[ d = \sqrt{(10)^2 + (7)^2} \] \[ d = \sqrt{100 + 49} \] \[ d = \sqrt{149} \]
Now calculating \( \sqrt{149} \):
\[ \sqrt{149} \approx 12.206 \]
Rounding this to the nearest tenth gives:
\[ \approx 12.2 \]
Thus, the distance between points A and B is approximately 12.2.