Question

what is the coordinate of the midpoint of qr? write your answer as an integer or a decimal, or mixed number in simplest form.

Explanation:

Step1: Identify the coordinates

The coordinate of point $Q$ is $- 30$ and the coordinate of point $R$ is $10$.

Step2: Apply mid - point formula

The mid - point formula for two points $x_1$ and $x_2$ on a number line is $\frac{x_1 + x_2}{2}$. Here $x_1=-30$ and $x_2 = 10$. So, $\frac{-30 + 10}{2}=\frac{-20}{2}=-10$.

Answer:

$-10$