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1 December, 12:50

Evaluate 15r+6 (60-r) for r = 20,30 and 40. what conclusion can you draw

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  1. 1 December, 13:04
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    15 (20) + 6 (60-20) = 240

    15 (30) + 6 (60-30) = 630

    15 (40) + 6 (60-40) = 720

    you can conclude that none of the numbers have anything in common except that they all end in a 0
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