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4 July, 06:43

The cost of paper varies directly with the number of reams bought. Suppose 2 reams cost $5.10. Write a linear equation that could be used to find the cost of x reams of paper. Find the cost of 15 reams of paper

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  1. 4 July, 09:15
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    let x be the number of reams of paper and $y be the cost.

    y=kx

    when x=2, y=5.10,

    5.10=k (2)

    2k=5.10

    k=2.55

    y=2.55x

    cost of 15 reams of paoer = 2.55 (15) = 38.25
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