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DessAnnette2751
10.10.2019 •
Mathematics
Arectangle on the coordinate plane has vertices at (0,0), (3,0), (3,2), and (0,2). a dialation of the rectangle has vertices at (0,0), (9,0), (9,6), and (0,1). find the scale factor
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Ответ:
The scale factor is 3.
Step-by-step explanation:
1. You kwnow that original rectangle has the following coordinates in its vertices:
(0,0), (3,0), (3,2), and (0,2)
2. After dilation, the rectangle has vertices at (0,0), (9,0), (9,6), and (0,1). Therefore, you can calculate the scale factor as following:
Let's call
the scale factor and let's choose one the coordinates of the original rectangle and the same coordinate after dilation:
Original vertex: (3,2) ; Vertex after dilation: (9,6)
Then:
The scale factor is 3.
Ответ:
-5x = 78 + 25
-5x = 103
x = 103/-5
x = -20.6
Compare her solution with that above.