Solve 21 & 22 give explanation

[tex] \qquad \qquad \bf \huge\star \: \: \large{ \underline{Answer} } \huge \: \: \star[/tex]
[tex]\textsf{ \underline{\underline{Steps to solve the problem} }:}[/tex]
By using Distance formula ~
[tex]\qquad❖ \: \sf \: \sqrt{(x2 - x1) {}^{2} + (y2 - y1) {}^{2} } [/tex]
[tex]\qquad❖ \: \sf \: \sqrt{ ( - 8 - ( - 8)) {}^{2} + ( - 8 - 5) {}^{2} } [/tex]
[tex]\qquad❖ \: \sf \: \sqrt{0 + ( - 13) {}^{2} } [/tex]
[tex]\qquad❖ \: \sf \: \sqrt{169} [/tex]
[tex]\qquad❖ \: \sf \:13 \: \: units[/tex]
[tex] \qquad \large \sf {Conclusion} : [/tex]
The distance between the points is 13 units