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rewona [7]
3 years ago
10

Simplify 24 - 15 - 3+ 2.6. O A. 30 O B. 31 O C. 126 O D. 15

Mathematics
1 answer:
sveticcg [70]3 years ago
8 0

Answer:

D

Step-by-step explanation:

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B, D, and E

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Really Need Help Quick Please! Must turn this in . Please show work. Brainliest answer will be awarded to quickest, correct answ
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I need help with this problem plz
VladimirAG [237]

Answer:

<u>x = 18</u>

Step-by-step explanation:

1. Let's solve for x, using the supplementary angles theorem, this way:

∠ C = 180 - 7x + 2 because they are supplementary angles. And these angles add up to 180 degrees.

∠ D = 180 - 9x + 31 because they are supplementary angles. And these angles add up to 180 degrees.

∠ E = 180 - 4x - 33 because they are supplementary angles. And these angles add up to 180 degrees.

Now, let's recall that the interior angles of a triangle add up to 180 degrees. Thus:

∠ C + ∠ D + ∠ E = 180 °

Replacing with the real values for solving for x:

180 - 9x + 31 + 180 - 4x - 33 + 180 - 7x + 2 = 180

- 20 x + 540 = 180

- 20 x = 180 - 540 (Subtracting 540 to both sides)

- 20 x = - 360

<u>x = 18 (Dividing by - 20)</u>

<u>Proving that x = 18 is correct</u>

180 - 9x + 31 + 180 - 4x - 33 + 180 - 7x + 2 = 180

180 - 9 (18) + 31 + 180 - 4 (18) - 33 + 180 - 7 (18) + 2 = 180

180 - 162 + 31 + 180 - 72 - 33 + 180 - 126 + 2 = 180

573 - 393 = 180

180 = 180

<u>We proved that x = 18 is correct</u>

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3 years ago
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