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maria [59]
3 years ago
13

The sum (c−4)+(3c+9) is

Mathematics
2 answers:
ioda3 years ago
8 0

When you do this you will get 4c+5.

just olya [345]3 years ago
6 0

4c+5


hope that helps you out

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Answer:

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Step-by-step explanation:

<u><em>The complete question is</em></u>

Chase is building a birdhouse in the shape of a regular polygon. He knows that the measure of the interior angle is twice the measure of the exterior angle and the length of a diagonal that passes through the center is 12. What is the perimeter of the base of the birdhouse?

step 1

Find the measure of the interior angle

Let

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y ---> the measure of the exterior angle

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so

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step 2

Remember that

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substitute

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3 years ago
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