Triangle ABC is reflected across the x-axis. If the coordinates of the original shape are A (-4, -1) B (-5, -2) and (-10, -1) what are the coordinates of A', B'day and C'?

When a point is reflected across the x-axis, the x-coordinate stays the same, but the y-coordinate changes sign.

The coordinates of A' would be (-4, 1), B' would be (-5, 2), and C' would be (-10, 1).