Here is part of a timetable for the Paris to Montpellier express train service. The average speed of the 20 07 train from Paris is 224 km/h. Work out the distance this train travels from Paris to Montpelli

772.8 km

Step-by-step explanation:

Speed is the rate of change of distance. Speed is the ratio of distance travelled to time taken. Average speed is the ratio of the total distance travelled to the total time taken, it is given by:

Average speed = Total distance / total time

The 20 07 train leaves Paris at 20:07 and reaches Montpellier at 23:34. This means that the total time taken is 3 hours 27 minutes, that is 3.45 hours.

Given that average speed is 224 km/h, hence:

Average speed = total distance / total time

224 km/h = total distance / 3.45 h

total distance = 224 * 3.45 = 772.8 km

the answer is y < -3 or   y > 3

-3y > 7 + 2

-3 y > 9

y < -3