Jon places a point on a coordinate plane at (-1, -12). He wants to place another point across the y-axis, and it must be 11 points away. Where will Jon place the other point?

To place another point across the y-axis, Jon needs to keep the x-coordinate the same and change the sign of the y-coordinate. Since the current y-coordinate is -12, Jon needs to move 11 points away, so the new y-coordinate will be 12.

Therefore, the other point will be placed at (-1, 12).

To place another point across the y-axis from the point (-1, -12), we need to find a point that is 11 units away on the x-axis.

Since the point is across the y-axis, the x-coordinate will have the opposite sign. In this case, since the current x-coordinate is -1, the new x-coordinate will be positive.

To find the new x-coordinate, we add 11 units to the current x-coordinate: -1 + 11 = 10.

Therefore, Jon will place the other point at (10, -12) on the coordinate plane.

To place another point across the y-axis 11 points away from (-1, -12), we need to find a new point that has the same x-coordinate as (-1, -12) but with opposite y-coordinate.

The y-coordinate of (-1, -12) is -12. Since we want the new point to be 11 points away, we need to add 11 to the y-coordinate of (-1, -12). However, since we want the new point to be across the y-axis, we need to change the sign of the y-coordinate.

Therefore, the new point will have the same x-coordinate of -1, but the opposite y-coordinate of +12.

Hence, Jon will place the other point across the y-axis at (-1, +12).