Question

One computer desk is located at (7, 2) on the map. Another is located at (7, -8). How many feet separate the two computer desks? Explain or show how you got your answer.

Answer 1

We know already that desk A and desk B are on the same column, since both coordinates' x factors are 7. So all we need to do now is find the differeance of 2 and -8. So, we get the [very simple] equation 2 - (-8) = d. Now, when you subtract a negative, it's pretty much just adding, so we can simplify this equation to 2 + 8 = d, and we all know 2 + 8 = 10. So the distance between the two desks is 10 units.

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