Concept explainers
To Find:The cost of printing 1500 copies.
Answer to Problem 7ST
So, the cost of printing 1500 copies is $710.
Explanation of Solution
Given information:The cost of printing the school newspaper is $500 for 800 copies and $620 for 1200 copies and the printing is a linear function of the copies printed.
Calculation:
Let the linear function of the copies printed be ,
Cost of printing 800 copies is 500.
Therefore,
Cost of printing 1200 copies is 620.
Therefore,
Subtract equation (2) from equation (3),we get.
Substitute a =0.3 in equation(2).
Therefore the cost function is,
To find the cost of 1500 copies substitute x =1500 in cost function we get,
So, the cost of 1500 copies is $710.
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Algebra and Trigonometry: Structure and Method, Book 2
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