Two buses are driving along parallel freeways that are`\ 5`miles apart, one heading east and the other heading west. Assuming that each bus drives a constant `55\ mph`, find the rate at which the distance between the buses is changing when they are `13`miles apart, heading toward each other.

5x+2x=49

7x=49

x=7. 35 apples

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)