Jonathan and laura are three miles apart and are traveling towards each other. if jonathan travels m miles, write an expression to represent how far laura has traveled when they meet each other.

The sum of the number of miles that should be traveled by Jonathan and Laura to total 3 miles together should be expressed as,
                                  m + x = 3
By subtracting m from both sides of the equation, we get
                                        x = 3 - m
Now, we see that the expression for the distance that Laura traveled is,
                                         3 - m

Cd is the perpendicular bisector of both xy and st, and cy=20.find xy