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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.-example-1

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Answer:

b = 55 degrees

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.

User Leszek Szary
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