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ser-zykov [4K]
3 years ago
15

Katherine needs to cut a piece of cardboard for an art project at school. She has four pieces of cardboard that she can cut from

6 inches, 5 inches, 7 inches, and 3 inches. If the length of the cardboard she needs is square root 35 inches, which piece of cardboard should she cut to create the least amount of unused cardboard?
3 inches

5 inches

6 inches

7 inches
Mathematics
1 answer:
Rasek [7]3 years ago
3 0
Cut five inches to creat the least amount of unused cardboard.
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4x²-y²=171 and 2x-y=9, value of 2x+y
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So you will need to solve for x and y before evaluating 2x+y....

2x-y=9, y=2x-9  now this will make 4x^2-y^2=171 become:

4x^2-(2x-9)^2=171

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x=7, now we can use 2x-y=9 to solve for y...

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now we know that x=7 and y=5, 2x+y becomes:

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Answer : D

WORK...
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