1. **State the problem:**
We have triangle ABC with vertices A(-3, -2), B(0, 4), and C(4, 1).
We want to find the coordinates of the triangle after two transformations:
- Dilate by a factor of 2 centered at the origin.
- Reflect across the x-axis.
2. **Dilate by a factor of 2 centered at the origin:**
The dilation formula for a point $(x,y)$ with center at the origin and scale factor $k$ is:
$$ (x', y') = (kx, ky) $$
Applying this to each vertex with $k=2$:
- $A' = (2 \times -3, 2 \times -2) = (-6, -4)$
- $B' = (2 \times 0, 2 \times 4) = (0, 8)$
- $C' = (2 \times 4, 2 \times 1) = (8, 2)$
3. **Reflect across the x-axis:**
Reflection across the x-axis changes a point $(x,y)$ to $(x, -y)$.
Applying this to each dilated vertex:
- $A'' = (-6, -(-4)) = (-6, 4)$
- $B'' = (0, -8)$
- $C'' = (8, -2)$
4. **Final coordinates:**
The vertices of the transformed triangle are:
$$ A''(-6, 4), B''(0, -8), C''(8, -2) $$
This completes the transformations and gives the final triangle coordinates.
Triangle Transformations C7Ac5D
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