SOLUTION: Beatriz commutes to work every day. On her way to work, there is a lot of Road Reparation going on and she travels at 40 miles per hour. On the way home, the road is new, and she
Algebra ->
Expressions-with-variables
-> SOLUTION: Beatriz commutes to work every day. On her way to work, there is a lot of Road Reparation going on and she travels at 40 miles per hour. On the way home, the road is new, and she
Log On
Question 292561: Beatriz commutes to work every day. On her way to work, there is a lot of Road Reparation going on and she travels at 40 miles per hour. On the way home, the road is new, and she travels at 90 miles per hour. What is Beatriz’s average commute velocity? Answer by ankor@dixie-net.com(22740) (Show Source):
You can put this solution on YOUR website! going she travels at 40 miles per hour.
returning, travels at 90 miles per hour.
What is Beatriz’s average commute velocity?
:
Let d = distance traveled one way
Let s = average speed for the commute
:
Write time equation: Time = dist/speed
:
Go time + return time = total time + =
multiply equation by 360s. results:
9ds + 4ds = 360(2d)
13ds = 720d
Divide both sides by d
13s = 720
s =
s = 55.38 mph is the average speed
:
:
