SOLUTION: Carlos walks around the track 10 times at a rate of x laps per hour. He runs around the track 8 times at a rate of 3x laps per hour. Write and solve an expression for the time it t

Algebra ->  Rational-functions -> SOLUTION: Carlos walks around the track 10 times at a rate of x laps per hour. He runs around the track 8 times at a rate of 3x laps per hour. Write and solve an expression for the time it t      Log On


   



Question 872170: Carlos walks around the track 10 times at a rate of x laps per hour. He runs around the track 8 times at a rate of 3x laps per hour. Write and solve an expression for the time it takes him to go 18 times around the track.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Carlos walks around the track 10 times at a rate of x laps per hour.
He runs around the track 8 times at a rate of 3x laps per hour.
Write and solve an expression for the time it takes him to go 18 times around the track.
:
Write a time equation; time = dist/speed
:
Walk time + run time = total time
10%2Fx + 8%2F%283x%29 =
find the common denominator (3x)
%28%283%2810%29+%2B+8%29%29%2F%283x%29 = 38%2F%283x%29 time to go around 18 times