THE CORRECT ANSWER IS (E). SINCE X EQUALS THE RATE (SPEED) OF THE...

34. The correct answer is (E). Since x equals the rate (speed) of the freight train, you can

express the rate of the passenger train as x

1

45. Substitute these values for time and

rate into the formula for each train:

Formula: rate

3

time

5

distance

Passenger:

~x

1

45!~3! 5

3x

1

135

Freight:

~x!~3! 5

3x

The combined distance that the two trains covered is 3x

1

(3x

1

135)

5

6x

1

135.