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netineya [11]
3 years ago
7

I need to know what is the m< DBC?

Mathematics
2 answers:
Thepotemich [5.8K]3 years ago
8 0
<h2><em>Answer:</em></h2><h2><em>1</em><em>2</em><em>0</em><em>°</em></h2>

<em>Solution</em><em>,</em>

<em>2</em><em>x</em><em>+</em><em>X+</em><em>9</em><em>0</em><em>=</em><em>1</em><em>8</em><em>0</em><em>°</em><em> </em><em>(</em><em> </em><em>sum </em><em>of </em><em>angle </em><em>in </em><em>straight</em><em> </em><em>line)</em>

<em>or,</em><em>3</em><em>x</em><em>+</em><em>9</em><em>0</em><em>=</em><em>1</em><em>8</em><em>0</em><em>°</em>

<em>or,</em><em>3</em><em>x</em><em>=</em><em>1</em><em>8</em><em>0</em><em>-</em><em>9</em><em>0</em>

<em>or,</em><em>3</em><em>x</em><em>=</em><em>9</em><em>0</em>

<em>or,</em><em>X=</em><em>9</em><em>0</em><em>/</em><em>3</em>

<em>X=</em><em>3</em><em>0</em>

<em>Value </em><em>of </em><em>X </em><em>is </em><em>3</em><em>0</em><em>°</em>

<em>Again,</em>

<em>Replacing</em><em> </em><em>value,</em>

<em><</em><em>DBC=</em><em>X+</em><em>9</em><em>0</em><em>°</em>

<em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>=</em><em> </em><em>3</em><em>0</em><em>°</em><em>+</em><em>9</em><em>0</em><em>°</em>

<em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>=</em><em> </em><em>1</em><em>2</em><em>0</em><em>°</em>

<em>Hope </em><em>it </em><em>helps</em>

<em>Good </em><em>luck</em><em> on</em><em> your</em><em> assignment</em>

Artist 52 [7]3 years ago
5 0

Answer:

120

Step-by-step explanation:

The sum of the angles is 180 since it forms a straight line

2x+ x+90 = 180

Combine like terms

3x +90=180

Subtract 90 from each side

3x+90-90=180-90

3x= 90

Divide each side by 3

3x/3 = 90/3

x = 30

We want angle DBC = x+90

                                   = 30+90

                                   =120

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