Sum of Rationals

Question

On a number line, the coordinate of point R is −23.8. Point S is located 12.5 units to the left of point R.
Question 1
What is the coordinate of point S?
Responses
A −36.3−36.3
B −12.2−12.2
C −11.3−11.3
D 11.3

Answer 1

To find the coordinate of point S, we need to subtract the distance from point R.

Point R is at -23.8, and point S is located 12.5 units to the left of point R. This means we need to perform the following calculation:

\[ \text{Coordinate of S} = \text{Coordinate of R} - \text{Distance to the left} \]

\[ \text{Coordinate of S} = -23.8 - 12.5 \]

Calculating that:

\[ -23.8 - 12.5 = -36.3 \]

So, the coordinate of point S is -36.3.

The correct response is: A. −36.3