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Ksju [112]
2 years ago
6

The quadrilateral shown is a parallelogram. What is the measure of DC?

Mathematics
1 answer:
Schach [20]2 years ago
6 0

Answer:

B) 12

Step-by-step explanation:

Opposite sides are congruent

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Plug in "0" for "x" ;

8*0² + 23 =? 823? ; 

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_________________________________________________
2)  The answers:  x = 10, -10 ; or, write as:  x = ± 10 .
_________________________________________________

To solve:

GIven:  8x² + 23 = 823 ; 

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_____________________________________________
           8x² + 23 - 23 = 823 - 23 ; 
to get:  
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to get:  x² = 100 ; 

        Take the "square root" of EACH SIDE of the equation; to isolate "x" on one side of the equation; and to solve for "x" ; 

          √(x²) = √(100) ;

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The answers:  x = 10, -10 ; or, write as:  x = </span><span>± 10 .
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