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  • 12-12-2017
  • Mathematics
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Two supplementary angles have measures of 9x degrees and 3x degrees. What is the measure of the longer angle?

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rgwoot
rgwoot rgwoot
  • 12-12-2017
9x+3x=180 by def. of supplementary
12x=180
12/12x=180/12
x=15

9x=9(15)=135°
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