Answer: The distance formula can be used to solve this equation. [tex]d= \sqrt{(x_{1}-x_{2})^2+(y_{1}-y_{2})^2[/tex] After plugging in all the values you get: [tex]d= \sqrt{(5-1)^2+(5-5)^2} [/tex] This simplifies to [tex]d= \sqrt{16} [/tex], so the distance between the two points is 4.