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Andre45 [30]
2 years ago
10

PLEASE SOLVE FOR BRAINLIEST

Mathematics
2 answers:
velikii [3]2 years ago
7 0

Apply angle sum property

\\ \tt\Rrightarrow 4x-12+63+45=180

\\ \tt\Rrightarrow 4x+51+45=180

\\ \tt\Rrightarrow 4x+96=180

\\ \tt\Rrightarrow 4x=84

\\ \tt\Rrightarrow x=21

klemol [59]2 years ago
3 0

Answer:

x = 21°

Explanation:

All the interior angles of the triangle sum up to 180°

45 + 63 + 4x -12 = 180°

96° + 4x = 180°

4x = 180° - 96°

4x = 84°

x = 21°

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Step-by-step explanation:

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a.  3I   1   3   -34   48

I'm going to do this one in its entirety so you get the idea of how to do it, then you'll be able to do it on your own.

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3I   1    3    -34    48

   _____________

      1

then multiply it by the 3 and put it up under the 3.  Add those together:

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           3

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      1     6

Now I'm going to multiply the 6 by the 3 after the bold line and add:

3I    1     3     -34     48                                                                                                    

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_________________

      1      6     -16

Same process, I'm going to multiply the -16 by the 3 after the bold line and add:

3I      1      3      -34      48

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___________________

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That last zero tells me that x-3 is a factor of that polynomial, AND that the depressed polynomial is one degree lesser and those numbers there under that line represent the leading coefficients of the depressed polynomial:

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You got this!        

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