Acopy machine makes 24 copies per minute . how long does it take to make 84 copies

Use the ratio:

24 copies 84 copies
—————- = ——————
1 minute x

On the top, you multiplied 24 by 3.5 to get to 84. Therefore, you must do the same on the bottom (denominators).

1 minute x 3,5

1 x 3.5 = 3.5

So, it takes 3.5 minutes to make 84 copies.

Hope this helps! c:

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