2. NO HOMEWORK QUIZ TURN IN WORK!!!!!!

3. Rational Review

11. As X approaches infinity

13. Asymptotes and Discontinuity

20. Domain and Range

21. Translation

22. Inequality

23. Most tunnels are drilled using tunnel-boring machines that begin at both ends of the tunnel. Suppose a new underwater tunnel is being built and one tunnel-boring machine alone can finish the tunnel in 4 years. A different type of machine can tunnel to the other side in 3 years. If both machines start at opposite ends and work at the same time, when will the tunnel be finished?

24. Let x = number of years together

25. Equation:

26. Let x = number of years together Equation:

27. Solve equation: multiply by common denominator (4)(3)(x).

32. If both machines work toward each other it will take 1.7 years to finish the tunnel.

34. A car travels 300 km in the same time that a freight train travels 200 km. The speed of the car is 20 km/hr more than the speed of the train. Find the speed of the car and the speed of the train.

35. Let x = speed of train Let x + 20 = speed of car

36. A car travels 300 km in the same time that a freight train travels 200 km. The speed of the car is 20 km/hr more than the speed of the train. Find the speed of the car and the speed of the train. Let x = speed of train Let x + 20 = speed of car

37. Use the formula d = rt. Solve for “t”.

38. t = d/r Use the formula d = rt. Solve for “t”.

39. t = d/r Use the formula d = rt. Solve for “t”.

40. t = d/r Use the formula d = rt. Solve for “t”.

41. t = d/r Use the formula d = rt. Solve for “t”.

42. Solve: multiply by the common denominator (x + 20)(x).

47. Speed of train = x = 40 km/hr

48. Speed of car = x + 20 = 60 km/hr

49. Speed of train = x = 40 km/hr Speed of car = x + 20 = 60 km/hr

50. A boat travels 20 miles upstream(means against the current) with a current going 4 miles/hour. The boat makes the trip THERE AND BACK in 5 hours. What is the SPEED OF THE BOAT?