The last option. The lines graphed never touch so there is no solution
Answer:
Step-by-step explanation:
Train 1 will travel for 2 hours before the second train leaves.
<u>The distance at 2 o'clock is reduced by 2*90 = 180 miles and now is:</u>
<u>Let the trains spend x hours before crossing, then we have following equation for the distance:</u>
- x(90 + 80) = 1820
- 170x = 1820
- x = 1820/170
- x = 10 120/170 = 10 12/17 hours ≈ 10 hours and 42 minutes
<u>The trains will cross at:</u>
- 2 o'clock + 10 h 42 min = 12:42
The time when trains cross each other will be approximately 12:42
Answer: For number one it's decreasing
Step-by-step explanation: