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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... -

    in algebic expression method... with those two equation..

  • math -

    Total cost=900+42x
    totalcostperbook=totalcost/x= 900/x+42

    = 900/200+42 -900/600 -42
    = 900(1/200-1/600)
    = 900(400/(200*600))=900 (1/300)= check my work.

  • math -

    32 less than three fourths of a number

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