ANSWER
The distance is √58
EXPLANATION
The distance 'd' from the red point to the origin is the length of the hypotenuse triangle formed by the vertical distance between the point and the origin (3 units) and the horizontal distance between them (7 units).
Using the Pythagorean theorem, the distance is:
[tex]\begin{gathered} d^2=7^2+3^2 \\ d^2=49+9 \\ d^2=58 \\ d=\sqrt[]{58} \end{gathered}[/tex]
