SOLUTION: Starting from 1.8 miles away, a car drives towards a speed check point and then passes it. The car travels at a constant rate of 45 MPH. The distance the car travels from the check

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: Starting from 1.8 miles away, a car drives towards a speed check point and then passes it. The car travels at a constant rate of 45 MPH. The distance the car travels from the check      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 920444: Starting from 1.8 miles away, a car drives towards a speed check point and then passes it. The car travels at a constant rate of 45 MPH. The distance the car travels from the check point is given by d=/1.8-45t/. At what times is the car 0.4 miles from the checkpoint?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Starting from 1.8 miles away, a car drives towards a speed check point and then passes it. The car travels at a constant rate of 45 MPH. The distance the car travels from the check point is given by d=/1.8-45t/. At what times is the car 0.4 miles from the checkpoint?
------------
Solve::
|1.8-45t| = 0.4
----
1.8-45t = 0.4 or 1.8-45t = -0.4
-----
45t = 1.8-0.4
45t = 1.4
t = 0.03
---
Or
45t = 1.8+0.4
45t = 2.2
t = 0.049
===============
Cheers,
Stan H.
---------------