Question

walking marshall lives 2300 yards from school and 1500 yards from the pharmacy. the school, pharmacy, and his home are all collinear, as shown in the figure.
diagram: school --- pharmacy --- home, with 2300 yards (school to home) and 1500 yards (pharmacy to home) labeled
what is the distance from the pharmacy to the school?

Explanation:

Step1: Identify the total and part distance

The total distance from school to home is 2300 yards, and the distance from pharmacy to home is 1500 yards.

Step2: Calculate the distance from pharmacy to school

To find the distance from pharmacy to school, we subtract the distance from pharmacy to home from the distance from school to home. So, it is $2300 - 1500$.
$2300 - 1500 = 800$

Answer:

The distance from the pharmacy to the school is 800 yards.