arlen54
arlen54 arlen54
  • 02-05-2020
  • Mathematics
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  • 02-05-2020

Answer:

C. x = 42

Step-by-step explanation:

First we need to use the triangle sum theorem to find the measure of the third angle of the triangle.

180 = 126 + 16 + y

180 = 142 + y

y = 38

Now that we found that, we can then figure out the measure of x, knowing that the three angles make a straight angle, which is 180°

180 = 16 + 38 + 3x

180 = 54 + 3x

126 = 3x

x = 42

The value of x is 42.

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