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svetlana [45]
3 years ago
13

Which of the following could be a rational number? Group of answer choices the sum of a rational number and an irrational number

the product of a rational number and an irrational number the product of two irrational numbers the sum of two irrational numbers
Mathematics
1 answer:
insens350 [35]3 years ago
4 0

Answer:

Step-by-step explanation:

the sum and product of two rational number

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Given:

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To find:

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Solution:

BD is the angle bisector of ABC. So,

m\angle ABD=m\angle DBC

3x=x+20

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Divide both sides by 2.

x=\dfrac{20}{2}

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Now,

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m\angle DBC=(10+20)^\circ

m\angle DBC=30^\circ

And,

m\angle ABC=(3x)^\circ+(x+20)^\circ

m\angle ABC=(4x+20)^\circ

m\angle ABC=(4(10)+20)^\circ

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Therefore, m\angle DBC=30^\circ,m\angle ABD=30^\circ and m\angle ABC=60^\circ.

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3 years ago
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Answer:

Step-by-step explanation:

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