### (8 March 2011) Chapter 4: Algebra... What it means...

The total monthly cost of running a factory is \$(800x + 4500), where x is the number of odd job workers employed.
(a) Find the cost of running the factory in a particular month in which 15 odd job workers were employed.
(b) Give a possible interpretation of the numbers 800 and 4500.

This question is compulsory.

Source: Discovering Mathematics Workbook (p21)

1. a) \$(800*15+4500)=\$57000
b)They are the constants of the expression... I think...

2. a)\$12000
b)800 is probably the salary of each worker,which is \$800.
4500 is probably the cost of maintainence for the machines and its bills.

3. This comment has been removed by the author.

4. Mark :) :( :'( (^^^) :D :O :42: O:) :p 3:)3/08/2011 12:19:00 PM

a) \$(800x15) + \$4500= \$16500

b) 800 is a coefficient while 4500 is a constant.

5. a)\$800 x 15 = \$12000
\$12000 + 4500 = \$16500
b)\$800 might be the pay of the workers and \$4500 might be the cost of maintaining the factory.

6. Mark :) :( :'( (^^^) :D :O :42: O:) :p 3:)3/08/2011 12:22:00 PM

WOops

b) \$800 is the pay of each worker while \$4500 is to maintain the equipment and such

7. a. \$(800*15+4500)=\$12000
b. 800 is a coefficient while 4500 is a constant which are the money used to paid for the electricity bills, maintenance fees and spent on other stuffs.

8. a) (\$800 x 15 + \$4500)= \$16 500
b) 800 could be the salary of the workers and 4500 may be the other costs for necessities.

9. a)\$(800(15)+4500)=\$16500
b)4500 is the constant and 800 is the coefficient of x

10. a) \$800x15+\$4500=\$16500
b)\$800 is the salary for the workers and \$4500 is the other expenditure of the factory. They are both constant values and the expenditure of the factory.

11. a) \$800 x 15 + \$4500 = \$16500
b) 800 is the coefficient and is multiplied by x while \$4500 is the constant which does not change and it is used to pay material costs and bills.

12. Chan Shawn Kit3/08/2011 12:28:00 PM

1) (\$800x15)+\$4500
=\$12000+\$4500
=\$16500
2)800=Salary of 1 foreign worker per month
4500=Maintenance of the factory

13. (a)cost=15*800+4500=16500
(b)x is the cost of hiring odd job workers and 4500 is the money spent on other things in the factory.

14. a)(800*15)+4500=16500
\$16500
b)\$800 is the salary of teh workers and \$4500 is maintanence

15. (a) \$800*15+4500 = \$12000+\$4500
= \$16500
(b) 800 is the salary and 4500 is the extra costs.

16. (a)\$800×15+\$4 500=\$16 500

(b)800 is the pay of each odd job worker in one month. 4 500 is used for the maintenance of the factory.

~Nina

17. (a) \$(800*15+4500)=\$16 500
(b) 800 is the monthly salary of each odd job worker. 4500 is the cost of maintenance, electrical bills, etc.

18. (a)\$16500
(b)\$800 could be the pay of each odd job worker while \$4500 could be used in improving the factory's facilities or whatever.

19. a) \$(800*15+4500)=\$(12000+4500)
=\$16500

b) The number 800 may be the salary of individual odd job workers and the number 4500 is the expenses to maintain and run the factory.

20. (a) \$(800 x 15 +4500)
=\$(12 000 + 4500)
=\$16 500

(b)I think that the \$800 is the cost to hire one worker for one month, and the \$4500 is the cost to maintain the factory.

21. @Yi Chieh @Mark @Kai En:
Notice that you were trying to describe what the numbers mean mathematically :) Good attempt.

On the other hand, the question asked for INTERPRETATION, which means explain these numbers in the context given.

Hence, like most of indicated, \$800 is the cost to hire one worker while \$4500 is the maintenance/ operating cost of the factory (which could include electricity bill, rental)

To all: The value to the 1st part is correct :)

22. a)\$16500
b)800 is the salary per month of each worker while 4500 is the cost of maintaining the factory.

23. [a] \$800x15 + 4500= \$16500
[b] \$800 is probably the salary of the workers and \$4500 could be the miscellaneous fees.