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cathyfrawley
16.10.2020 •
Mathematics
6. Quadrilateral DEFG is dilated by a factor of 0.5 with center (0, 0).
What are the new coordinates of point D?
A. (-3,2)
C. (-23)
B. (2-3)
D. (-3-2)
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Ответ:
2x - 1y = 1 ⇒ 10x - 5y = 5
y = -17
5x - 2(-17) = -6
5x + 34 = -6
- 34 - 34
5x = -40
5 5
x = -8
(x, y) = (-8, -17)
2x + 3y = 432 ⇒ 10x + 15y = 2160
5x + 2y = 16 ⇒ 10x + 4y = 32
11y = 2128
11 11
y = 193.4545455
2x + 3(193.4545455) = 432
2x + 580.3636364 = 432
- 580.3636364 - 580.3636364
2x = -148.3636364
2 2
x = -74.1818182
(x, y) = (-74.1818184, 193.4545455)