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Sloan [31]
2 years ago
11

Help me any smart person please

Mathematics
1 answer:
Rom4ik [11]2 years ago
4 0
The answer is A - 10 mm
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The first few steps in solving the quadratic equation 8x2 + 80x = −5 by completing the square are shown.
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3 years ago
The sides of a triangle have lengths of x, x + 5, and 25. If the longest side is 25, which of the following values of x would ma
Amiraneli [1.4K]
In a right angle, the sum of the squares of the two shorter sides is equal to the square of the longest side.
Here, the longest side is 25, the shorter sides are x and x+5.

x^2+(x+5)^2=25^2 \\
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(x-15)(x+20)=0 \\
x-15=0 \ \lor \ x+20=0 \\
x=15 \ \lor \ x=-20


The length of a side must be a positive number, so x=15.
The answer is C.
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