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o-na [289]
4 years ago
10

Two square pyramids have the same volume. The first pyramid has base edge 20 in. and height 21 in. The second pyramid has height

84 in. What is the base edge of the second pyramid?
Mathematics
1 answer:
GenaCL600 [577]4 years ago
6 0
84/21 = 4 20 * 4 = 80 So the base edge of the second pyramid is 80. Hope this helps :)
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First we pick the equation. Let's say we pick first one. From it we express y.

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Then we use this y and plug it in instead of y in the second equation.

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Now just solve for x.

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We plug this x in the first equation.

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And solve for y.

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So the solution to the equation is geometrically a point P which lies on the intersection of the two lines.

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Answer:


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