Question

Help please I am not understand​

Answer 1

Answer:

4.5 units

Step-by-step 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 = $\sqrt{(3+1)^2+(3-1)^2}$

    = $\sqrt{4^2+2^2}$

    = $\sqrt{16+4}$ = $\sqrt{20}$ ≈ 4.5 ( nearest tenth )