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3 years ago

Please Help!!! I will give brainliest!

Mathematics

1 answer:

Cloud [144]3 years ago

5 0

Answer:

Step-by-step explanation:

Table a has a output set for every input, making it a function. However, table B has 2 different outputs for 1 input. Therefore, A is a function and B is not.

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Consider triangle DEF with vertices D(1,1,1), E(1,-5,2) and F(-2,2,7).

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2. Find

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Then

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3. Find

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Then

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$\angle E=\arccos0=\dfrac{\pi}{2},\\ \\
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\angle F=\arccos\letf(\sqrt{\dfrac{46}{83}}\right)\approx 0.23\pi.$

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