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1 February, 18:39

Write a variable expression for the cost of b books

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  1. 1 February, 19:32
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    y=cd

    Step-by-step explanation:

    Here y is the total cost of books. c is the cost of one book, and d is the number of books.

    Here y is the dependent variable and d is the independent variable. For every changes in d, there is some changes observed in y.
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