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Answer:
The coordinates of B will be (3,-4).
Step-by-step explanation:
If a point on the coordinate plane reflects across the y-axis then its y-coordinate will not alter but the x-coordinate will change by its sign only.
Now, if B'(-3,-4) is the image of B after a reflection in the y-axis then we can say B is the image point when the original point is B'(-3,-4) after reflection in the y-axis.
Therefore, the coordinates of B will be (3,-4). (Answer)
Answer:

Step-by-step explanation:
Given


Required
The distance between them
This is calculated as:

So, we have:




Step-by-step explanation:
A - 2.5 = 1.5
A = 1.5 + 2.5 (Add 2.5 on both sides)
A = 4.