Posted by **Anonymous** on Wednesday, April 1, 2009 at 7:02pm.

A high school has designed the yearbook. A company charges $900 to assembly the master copy and $42 to make additional copies. The total selling price depends on how many copies are made. Write a function rule and determine how much will the school save on ecah book by ordering 600 instead of 200?

- math help... -
**Anonymous**, Wednesday, April 1, 2009 at 7:04pm
in algebic expression method... with those two equation..

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**bobpursley**, Wednesday, April 1, 2009 at 7:10pm
Total cost=900+42x

totalcostperbook=totalcost/x= 900/x+42

saveoneachbook=costperbook200-costperbook600

= 900/200+42 -900/600 -42

= 900(1/200-1/600)

= 900(400/(200*600))=900 (1/300)= check my work.

- math -
**tamia**, Tuesday, January 19, 2010 at 5:35pm
32 less than three fourths of a number

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