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umka21 [38]
3 years ago
10

Someone please help me I’ll give out brainliest please dont answer if you don’t know

Mathematics
1 answer:
geniusboy [140]3 years ago
7 0

Answer:

3

Step-by-step explanation:

Plug -1 into 8x² - 5

8 (-1)² - 5 =

8 * 1 - 5 =

8 - 5 =

3

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Which of the following numbers could be the sides of a right triangle. A)8,15,17. B)6,8,12 C)9,11,21 D)4,13,16
ArbitrLikvidat [17]

Answer:

A) 8, 15, 17.

Step-by-step explanation:

Right triangle obey the Pythagorean theorem. Thus, we choose the two smaller numbers (being the cathetus) and if after applying the P. Theorem we get the biggest of each option  (the hypotenuse) that means that those numbers could be the sides of a right triangle.

The Pythagorean theorem states that: a^2+b^2=c^2

Thus:

\sqrt{a^2+b^2}=c

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Option B:

\sqrt{6^2+8^2}  = 10 → 10 ≠ 12 NO

Option C:

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Option D:

\sqrt{4^2+13^2} = \sqrt{185} → \sqrt{185} ≠ 16 NO

3 0
3 years ago
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