hopeR13
30.04.2021 •
Mathematics
1 point
Select all of the following equations that have the same value as 3(x-5) =
-24
3x - 5 = -24
3x - 15 = -24
3x = -9
3x = -39
NO x= -13
X=-3
HEL
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Ответ:
First a more theoretical approach.
Suppose that we have a point (x, y), if you want to do a reflection over the y-axis, this point will transform into (-x, y).
This reflection leaves unchanged the distance between the point and the closest point to the axis of reflection.
Below, you can see a rough sketch of the situation.
Where the distance between the point S and the axis of reflection is 2 units, and the same for the distance between S' and the axis of reflection.
"Do you think you would see the same characteristic if you drew the line segment connecting T with the reflecting line and then T' with the reflecting line? How do you know?"
Yes, because as i wrote above, the distance between the point and the axis of reflection is invariant in this type of transformations.