Edward Chen - Real World Connection (2) Revised

1. A pilot needs to calculate the height of the airplane. The pilot needs to control the airplane and sometimes they need to keep the plane between two heights. Ex. When the airplane wants to land the airport tower tells the pilot to keep the airplane to 2500~2700 ft because other height will have other planes and is dangerous for 2 planes in the same height so the pilot needs to keep the airplane between 2500~2700 ft. The inequality will be (airplane = a) 2500ft≤a≤2700ft.

2. Solving simple inequalities

2.1. Steps

2.1.1. 1.Find unknown isolated

2.1.2. 2. Anything+/-

2.1.3. 3.Take the opposite

2.1.4. 4.Anything x /÷

2.1.4.1. Anything directly attached multiply by the reciprocal.

2.1.5. 5. Multiply by the reciprocal

2.2. Example question

2.2.1. I call a Taxi to my home and I tell the driver I'm going to Taoyuan airport. The distance from my home to the airport is 39.9Km I only have 1000 NTD in my pocket because I'm going to Seattle so I didn't bring a lot of NTD so if the times of meter fare of the taxi is X so the total cost is 70+5X. Write and solve an inequality to find the possible values of x.

2.3. How to solve the Example question?

2.3.1. 70+5X≤1000

2.3.1.1. This is a inequalities for this question 70+5x is meter fare. And I only have 1000 so the meter fare have to be less than my money which my money only have 1000.

2.3.2. 5X≤930

2.3.2.1. The second step we have to -70 because in Taipei our meter fare is start at at 70 .

2.3.3. X≤186

2.3.3.1. Divide 5 by 930 is 186 after I paid for Taxi driver I only have 186 left. This means the most time I can take is 186 minutes.

3. How often would you say you use this topic?

3.1. I will said I will use a lot after I'm 20 because after you have to take care of your self and sometime you have to think how much money you still have, how much time I still have, or how big is this object can this object fit in your apartment, or some think like that.....

4. Do you think you’ll continue to use this skill 5 years from now? 10?

4.1. Like I just said will start use that after I'm 20 and maybe used for whole life.

5. When you have 100 dollars in your pocket you can spend any number of dollars less or equal to a 100. So you check that the price of the products you want to buy is less or equal to 100.

6. Daily life

6.1. One day you ask your uncle to count how many push ups you can do. you bet your uncle you can do more than fifty. When you are finished you ask your uncle how many you did and he said you did 55 push up. 55 is bigger than 50 so is valid.

7. Profession

8. How do your uses compare to that of your peers?

8.1. According to Morris he use inequalities on when he becoming a math teacher he have to use a of thing from inequalities.

8.2. According to Joey he will use inequalities on you can calculate how much amount of thing you can buy.