SOLUTION: If David walks at the rate of 5 mph and jogs at the rate of 9 mph and it takes 3 hours to cover a distance of 23 miles, how much time was spent jogging? Select the correct answer.

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: If David walks at the rate of 5 mph and jogs at the rate of 9 mph and it takes 3 hours to cover a distance of 23 miles, how much time was spent jogging? Select the correct answer.      Log On


   

Question 804771: If David walks at the rate of 5 mph and jogs at the rate of 9 mph and it takes 3 hours to cover a distance of 23 miles, how much time was spent jogging?
Select the correct answer.
a. 1.2
b. 2
c. 4.5
d. 3
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
first the total time was 3 hours so c and d are impossible.
x walk
y jog
x+y=3,
5x+9y=23
x = 1, y = 2
answer b. 2