Two trains leave a city at the same time. One train goes west at a constant rate of 60 mph. The other goes east at a rate of 50 mph. How long will it take the trains to be 550 miles apart? A. 5 hours
B. 7 hours
C. 9 hours
D. 11 hours

Part a: explain why the x-coordinates of the points where the graphs of the equations y = 2−x and y = 8x+4 intersect are the solutions of the equation 2−x = 8x+4. (4 points) part b: make tables to find the solution to 2−x = 8x+4. take the integer values of x between −3 and 3. (4 points) part c: how can you solve the equation 2−x = 8x+4 graphically? (2 points)