Question

Find the distance CD rounded tothe nearest tenth.C = (7,-4) and D = (-8,-5)CD = [? ]HINT: Use the distance formula:d = V(x2 – xı)2 + (y2 – yı)2

Answer 1

Let:

$\begin{gathered} (x1,y1)=(7,-4) \\ (x2,y2)=(-8,-5) \end{gathered}$

Using the distance formula:

$\begin{gathered} d=\sqrt[]{(x2-x1)^2+(y2-y1)^2} \\ so\colon \\ d=\sqrt[]{(-8-7)^2+(-5-(-4))^2} \\ d=\sqrt[]{(-15)^2+(-1)^2} \\ d=\sqrt[]{226} \\ d\approx15.0 \end{gathered}$