math help for calculating the value of x in a circle

Mathematics
Tutor: None Selected Time limit: 1 Day

Nov 1st, 2015

Thank you for the opportunity to help you with your question!

Central angle= intercepted arc

AC is the diameter , so AEDC is an 1800 arc.

(6X+5)+(5X+3)+(8X+1)=1800

6X+5X+8X+5+3+1=1800

19X+9=1800

19X=171

X=171/19

X=9

The right answer is a. 

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Nov 1st, 2015

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