Question

Help please I am not understand​

Answer 1

4.5 units

Explanation:

The formula given is used to calculate the length of a segment given the coordinates of the endpoints.

let (x₁, y₁ ) = A(-1, 1) and (x₂, y₂ ) = (3,3), then

AB =
`√((3+1)^2+(3-1)^2)`

=
`√(4^2+2^2)`

=
`√(16+4)` =
`√(20)` ≈ 4.5 ( nearest tenth )