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3 years ago

10

A truck was carrying 2 and 1/8 tons of sand. When it arrived, only 1 and 1/2 ton of sand were left. How much sand was lost along

the way?

1 answer:

erica [24]3 years ago

5 0

I'm pretty sure it's 1 5/8

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$4k-20k^9=4k(1-5k^8)=4k\left[1^2-(k^4\sqrt5)^2\right]\\\\=4k(1-k^4\sqrt5)(1+k^4\sqrt5)=4k\left[1^2-(k^2\sqrt[4]5)^2\right](1+k^4\sqrt5)\\\\=4k(1-k^2\sqrt[4]5)(1+k^2\sqrt[4]5)(1+k^4\sqrt5)\\\\=4k\left[1^2-(k\sqrt[8]5)^2\right](1+k^2\sqrt[4]5)(1+k^4\sqrt5)\\\\=4k(1-k\sqrt[8]5)(1+k\sqrt[8]5)(1+k^2\sqrt[4]5)(1+k^4\sqrt5)$

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$Used:\ (a-b)(a+b)=a^2-b^2$

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