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30 points to whoever gets this right ( answer asap please ) ∠A and ∠B are supplementary angles. If m∠A = ( x − 9 )∘ and m∠B = ( 7 x + 21 ) ∘ , then find the measure of ∠B.

30 points to whoever gets this right ( answer asap please ) ∠A and ∠B are supplementary angles. If m∠A = ( x − 9 )∘ and m∠B = ( 7 x + 21 ) ∘ , then find the measure of ∠B.
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30 points to whoever gets this right ( answer asap please )

∠A and ∠B are supplementary angles. If m∠A = ( x − 9 )∘ and m∠B = ( 7 x + 21 ) ∘ , then find the measure of ∠B.

asked
User Giorgio Balestrieri
by
7.2k points

1 Answer

4 votes

Answer:

168°

Explanation:

answered
User Oleg Kodysh
by
8.5k points
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