If the average of 12 numbers is 14 and the average of 4 of those numbers is 18, what is the average of the other eight numbers?
1 answer:
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Answer:
Option d is correct.
Both the x and y coordinates of the point on δa'b'c' have opposite signs from the corresponding points on δabc.
Step-by-step explanation:
The rule of 180 degree rotation about the origin is:
Since a Rotation of a point through 180°, about the origin when a point a(h, k) is rotated about the origin through 180° in anticlockwise or clockwise direction.
then, By the rule of 180 degree rotation;
so, it takes the new position i.e,
Therefore, both the x and y coordinates of the point on δa'b'c' have opposite signs from the corresponding points on δabc.