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aklilrodowx1q5
18.10.2020 •
Mathematics
Simplify the expression.
−(−x)3 − x3
A. −4x3
B. −2x3
C. 2x3
D. 0
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Ответ:
D. 0
Step-by-step explanation:
Ответ:
Explanation:
A reflection accross the line y = - 1 will produce images with the same x-coordinate and change the - coordinate.
The y-coordinate of the image will be at the same distance from the line y = - 1 as the pre-image, on the other side of the line.
The vertex L has coordinates (4,1).
1. x-coordinate of L':
same x-coordinate of (4,1): 4.2. y-coordinate of L'
i) Determine the distance distance between L(4,1) and y = - 1:
| 1 - (-1)| = 2ii) Shift the y-coordinate of the line two units downward (because L is above the line, L' will be below the line). Then subtract 2 from - 1:
- 1 - 2 = - 3Thus, the y-coordinate of L' will be - 3.Hence, the resultant coordinates of vertex L' are (4, -3)