Write an expression in terms of x that represents the number of feet Alexandra has walked toward John since they started walking.

Question

John and Alexandra are 220 feet apart when they start walking toward one another. They are walking at the same speed, so whenever John travels some number of feet, Alexandra travels the same number of feet. Let  represent the number of feet John has traveled since he started walking toward Alexandra.

Write an expression in terms of that represents the number of feet Alexandra has walked toward John since they started walking.

Write an expression in terms of that represents the total number of feet John and Alexandra have walked toward one another since they started walking.

Write an expression in terms of that represents the distance (in feet) between John and Alexandra.

Answer 1

1. If John walks x feet, then Alexandra also walks x feet.
2. Total number of feet traveled by John and Alexandra is x + x = 2x
3. Distance between them = 220 - 2x

Answer 2

x=y

x+y

220-x-y