QuestionUnit 4: Rational Expressions and Equations Assignment Booklet 4
10. Consider each scenario: a. A high-speed passenger train in Europe completes an 800 km trip in 3 hours. The train travels the first 600 km at an average speed that was $100 \mathrm{~km} / \mathrm{h}$ faster than the last 200 km of the trip. If $x$ represents the average speed of the train on the second part of the trip, then an equation to represent this situation is: $$\frac{600}{x+100}+\frac{200}{x}=3$$
Identify all restrictions on the variable $x$ in this context. (2 marks)