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09.07.2021 •
Mathematics
I'M SO CONFUSED! TRIANGLE ABC has vertices A(0,4), B(-1,4), and C(0, -3). What are the coordinates of the image of point A after a dilation with a scale factor of 2?
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Ответ:
(0, 8 )
Step-by-step explanation:
Assuming the dilatation is centred at the origin then multiply the coordinates of point A by 2 , that is
A (0, 4 ) → A' (2(0), 2(4) ) → A' (0, 8 )
Ответ:
Explanation:
You multiple the x and y coordinates of A by 2 when dilating to get (0, 8).
Ответ:
We arrange the given 7 percentages in increasing order.
44%, 64%, 71%, 75%, 84%, 90%, 98%
The test score that he should drop is most likely be the lowest, 44%. The numbers after the drop are arranged as follows,
64%, 71%, 75%, 84%, 90%, 98%
The average (or mean) of these numbers is 80.33% and the median is 79.5%. Thus, Peter should choose the mean after dropping 44%. The answer should be the first choice.