what is the distance formula?

Answer 1

Distance formula

d = √(x₂- x₁)² + (y₂ - y₁)²

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regentsprep.org/Regents/math/distance/Ldistance.htm

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Answer 2

distance=speed *time or s= v*t
distance=initial velocity *time +(1/2 grativity*time*time) or s=ut+(1/2 a*t*t)

Answer 3

d = √(x2-x1)² + (y2-y1)² + (z2-z1)²

edit
I should mention that all that after the √ is "under the radical".