To find the midpoint of the line segment joining the points \((-5, -1)\) and \((-7, 10)\), you can use the midpoint formula:
\[ \text{Midpoint} \left( M_x, M_y \right) = \left( \frac{x_1 + x_2}{2}, \frac{y_1 + y_2}{2} \right) \]
Here, \((x_1, y_1) = (-5, -1)\) and \((x_2, y_2) = (-7, 10)\).
Now, plug in the coordinates into the formula:
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Calculate \(M_x\): \[ M_x = \frac{-5 + (-7)}{2} = \frac{-5 - 7}{2} = \frac{-12}{2} = -6 \]
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Calculate \(M_y\): \[ M_y = \frac{-1 + 10}{2} = \frac{9}{2} = 4.5 \]
Combining these values, the midpoint is:
\[ \text{Midpoint} = (-6, 4.5) \]
Thus, the final answer is:
\[ \boxed{(-6, 4.5)} \]