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Two supplementary angles have measures of 9x degrees and 3x degrees. What is the measure of the longer angle?

Two supplementary angles have measures of 9x degrees and 3x degrees. What is the measure of the longer angle?
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3 votes
Two supplementary angles have measures of 9x degrees and 3x degrees. What is the measure of the longer angle?

User Yogesh Doke
by
8.7k points

1 Answer

4 votes
9x+3x=180 by def. of supplementary
12x=180
12/12x=180/12
x=15

9x=9(15)=135°
User Kimari
by
8.8k points
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