Answer:
A
Step-by-step explanation:
The distance formula is [tex]\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]. Use the points (1,2) and (7,10) to substitute into the x and y values.
[tex]x_1 = 1\\y_1 =2\\x_2=7\\y_2=10[/tex]
[tex]\sqrt{(x_2-x_1)^2+(y_2-y_1)^2} \\\sqrt{(7-1)^2+(10-2)^2}[/tex]
The solution is [tex]\sqrt{(7-1)^2+(10-2)^2}[/tex] or A.
