Question

Calculate the distance between $A(7,3)$ and $B$ on the $x-axis$ whose abscissa is $11$.

Answer 1

Given,
$A(7,3)$ and coordinates of $B=(0,11)$ as $B$ lies on $x-axis.$

Now,

Say distance between $A$ and $B$ is $d$ then

$d=\sqrt{(x_1-x_2{)}^2+(y_1-y_2{)}^2}$

$d=\sqrt{(7-0{)}^2+(3-11{)}^2}$

$d=\sqrt{49+64}$

$d=\sqrt{113}unit$

Hence, this is the answer.