Question

what is the coordinate of the mid - point of $overline{st}$?
write your answer as an integer, decimal, or mixed number in simplest form.

Explanation:

Step1: Recall mid - point formula

For two points \(a\) and \(b\) on a number line, the mid - point \(M=\frac{a + b}{2}\). Here \(a=-31\) and \(b = - 30\).

Step2: Calculate mid - point

\(M=\frac{-31+( - 30)}{2}=\frac{-31 - 30}{2}=\frac{-61}{2}=-30.5\)

Answer:

\(-30.5\)