Question

Find the distance for the following points A ( -2, -3) B (-7, -8). If necessary round your answer to the nearest tenth. 1) 11
2) 7.1
3) 7
4) -7.1

Answer 1

distance = sqrt ( (x1-x2)^2 + (y1-y2)^2 ) =
= sqrt ( (-7 - [-2])^2 + ( -8 - [-3])^2 )

Answer 2

You know immediately that you can knock out number 4 because a distance will never been negative :P Then do as bahrom said^^

Answer 3

= sqrt ( (-7+2)^2 + (-8+3)^2 ) = sqrt ( (-5)^2 + (-5)^2 ) = sqrt ( 25 + 25 ) = sqrt (50)

Answer 4

which is approximately 7.1