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Re: Distance Question [#permalink]
26 Dec 2009, 16:25
This post was BOOKMARKED
The distance from the X-axis to point P is half the distance from the y-axis to point P. if the coordinates of P are (x,-7), how many units is P from the y-axis?
A. 3.5 B. 7 C. 9.8 D. 10.5 E. 14
The ans is E.
Can someone explain me this problem?
Couple of things: when we talk about the distance from the point to the line (any line including x and y-axis), the distance means the shortest distance, which is the length of the perpendicular from the point to the given line.
Back to the question. The point x has the coordinates (x,-7), which means that it's somewhere on the line y=-7. Hence the distance from this point to the X-axis is 7 units.
As the distance from the point to X-axis is half of the distance from it to the Y-axis, then the distance from it to the Y-axis is 7*2=14.
Re: The distance from the X-axis to point P is half the distance [#permalink]
29 Dec 2014, 14:41
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