### Chap 4 Algebra... Let's Talk Algebra

Let's express our daily activities with algebraic statements...

Title: My zZzZzZz... hours

Let m be the number of hours I sleep in on Saturday or Sunday
Let n be the number of hours I sleep in a weekday

Total number of hours I sleep in a week = 2 m + 5 n hours

Think about what you do or encounter everyday... use an algebraic statement to describe it (like what is shown above).

1. Title:My playing time... :P

Let m be the number of hours I play on Saturday and Sunday
Let n be the number of hours I play on weekdays

Total number of hours I play in a week=2 m + 5 n hours

2. Let ƒ be the number of hours I take to eat on Monday.
Let π be the number of hours I take to eat on Tuesday

Total number of hours it takes for me to eat on Monday and Tuesday = 1ƒ + 2π hours

3. The time that i am home alone
Let y be the number of hours I am alone at home during weekdays
Let x be the number of hours I am home alone during weekends

Total number that i am alone in a week= 5 y + 2x hours

4. Title : The amount of money I spend a day

Let m be the amount of money I spend on saturday or sunday.
Let n be the amount of money I spend on weekday.

Total amount I spend a week = \$(2m + 5n)

5. i have 'm' cousins from singapore
L are from malaysia.

m+L = 11

6. Title: My Time On The Computer

Let x be the time I use on the computer during weekends

Let y be the time I use on the computer during weekdays

Total amount of time I spent in the computer=2 x + 5 y hours

7. Let the number of hours I sleep in a day be q
The number of hours I sleep in a year:q x 365
=365q hours

8. In 1 Day,

Christopher spends 3X HRS On Homework
2U HRS On TV
12YHRS On Games
Total number of hours Christopher spends his day=3X+2U+12Y Hrs

9. Title: The hours I use to skype people

Let d be the number of hours I skype people on Saturdays or Sundays
Let p be the number of hours I skype people on a weekday

Total number of hours I skype people in a week = 2 d + 5 p hours

fyi: Skype is an online chat where you can send files, chat, call or video call. just in case you do not know...

10. Let ƒ be the number of hours I play tennis on Saturday and Singapore.

Let x be the number of hours I play tennis on
weekdays.

Total Number of hours I play tennis in a week = 2ƒ + 5x hours

11. Let p be my cousin brothers in singapore
Let j be my cousin sisters in singapore

Total number of cousins = p+j

12. Let the amount of money I spend in SST be x on Monday and wednesday and y for the rest,
Thus it becomes \$(2x+3y)= amount of money I spend in SST

13. Title: My number of hours on Facebook each day.

Let the number of hours I spend on Facebook on weekdays be x
Let the number of hours I spend on Facebook on weekends be y

Total number of hours: 2y+5x hours

14. Title: The time I spend playing Facebook

Let a be the number of hours I play Facebook during Thursdays and Fridays.

Let b be the number of hours I play Facebook during Mondays, Tuesdays and Wednesdays.

Total number of hours I play Facebook in a week = 2 a +3 b hours

15. Title: How much time I spend on homework on normal school days and holidays

Let x be the number of hours I spend on homework on normal school days
Let y be the number of hours I spend on homework on holidays

Total number of hours I spend on homework altogether = 5x + 3y

On every school month, I eat M bowls of carrot salad.
On the June and December holiday, I eat H bowls of carrot salad each month.

In total, I eat 10M + 2H bowls of carrot salad in every year.

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18. My time I spend to travel to School...

Let ƒ be the number of minutes I need to take to board the bus to Ang Mo Kio MRT (I stay at Ang Mo Kio)

Let ø be the number of minutes I need to take to board the MRT from Ang Mo Kio to Clementi MRT.

Let † be the number of minutes I need to take to walk to school from Clementi MRT station.

Total number of minutes I need to take to arrive at school from home
= ƒ min + ø min + † min
= (f + ø + †) min

19. title: my "music" hours in a month

let a be the number of hours i spend listening to music in a week.

hours i spend:
4a

20. My playing BLACKSHOT time.

I will play A be the hours i play on weekdays.
Let X be the hours i play during the weekend, 2 times a day for 1 week a month.

During the dec. holidays for 2 weeks, I will play Y hours a day during the weekends and 2 Y hours a day during the weekdays.

Done by darryl lam

21. My money saved from taking the train or bus when i have someone to drive me home during monday,tuesday and thursday.
Let r be the amount I saved during monday.
Let ƒ be the amount i saved during tuesday and thursday.

Total amount saved on Monday,Tuesday and Thursday = \$(1r + 5ƒ)

22. How many hours a year I spend hoping to meet Taylor Swift.

Let t be the number of days in a year
Let s be the number hours in a day

Number of hours= t x s
= ts

~Tay Pei Shan~

23. Title: The total 'weight' of my homeworks...

Let h be the 'weight' of homeworks I have during term one.
Let l be the 'weight of homeworks I have during term two.
Let a be the 'weight' of homeworks I have during term three.
Let b be the 'weight' of homeworks I have during term four.

Total 'weight' of homeworks I have in these 4 years
= 4h + 4l + 4a + 4b Mass of homeworks.

( Which is 10 tons of homeworks :P )

-Christopher Nah

24. Zhengjie,

From you storyline, could you elaborate why you tag a number to X, U and Y?

25. Carisa,

Am I right to interpret that in your storyline, you made reference to a typical school week - with the weekend interpreted as "holidays"?

26. Darryl

With what you defined, could you come up with an expresssion using "Y"? (or is there another variable "A" you mentioned at the start of the story?)

27. Dear S1-02

Some of you have given interesting examples how you could express your daily encounters :D

Well Done, everybody :D