alexa11364 alexa11364
  • 25-06-2019
  • Mathematics
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Answer it and show your work. Which letter choice is it.

Answer it and show your work Which letter choice is it class=

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altavistard
altavistard altavistard
  • 25-06-2019

Answer:

b = 55 degrees

Step-by-step explanation:

The angles 30, a, b and 45 must sum up to 180 degrees

Subtracting (30 + 45) from both sides leaves us with a + b = 105 degrees.

But b = a + 5.  Substituting a + 5 in the equation above yields

a + a + 5 = 105 degrees, so that

2a = 100 degrees, and a = 50 degrees.  Then b = a + 5, or b = 55 degrees.

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