Which expression represents the distance between the points (a, 0) and (0, 5) on a coordinate grid?
\(\displaystyle d= \sqrt{(x_1-x_0)^2+(y_1-y_0)^2}\) - d is distance, (x_1,y_1) and (x_0,y_0) two points on a coordinate grid.
In our case :
\((x_1,y_1)=(a,0)\\(x_0,y_0)=(0,5)\)
\(d= \sqrt{(a-0)^2+(0-5)^2} = \sqrt{a^2+25}\)