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Kruka [31]
3 years ago
12

How much sand is needed to fill a sandbox 8ft by 6ft to a depth of 18 inches?

Mathematics
1 answer:
Vladimir79 [104]3 years ago
3 0

18 inches x \frac{1 ft}{12 inches} = \frac{18}{12} ft = 1.5 ft

V = 8ft x 6ft x 1.5ft

  = 72 ft³

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Answer:

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Where a_{11} = 2, if we need to create a_{11} = 1, we need to multiply row 1 by \frac{1}{2}, that is to say:

\left[\begin{array}{cccc}1&\frac{1}{2} &-\frac{1}{2} &-4\\0&2&3&-6\\-\frac{1}{2} &1&1&-4\end{array}\right]

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