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posted by Evy on Friday, November 1, 2013 at 10:56pm.

The cost of an order of 10 computer disks and 3 packages of paper was $27. The next order was for 30 disks and 5 packages, and the cost was $65. Find the cost of a single disk and a single package of paper.

10d + 3p = 27 30d + 5p = 65 from the first, we see 30d + 9p = 81 so, subtracting, we see that 4p = 16 p=4 so, d=2.50

the professor answer for the disk is $1.50 who's right?

well, I see I was wrong. Could you not check my answer?

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