zeinab550 zeinab550

25-04-2020
Mathematics

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22kabrenner 22kabrenner

25-04-2020

Answer:

arch AD is 43 degrees

Step-by-step explanation:

180-90=90

90=7x+1+9x-7

90=16x-6

96=16x

6=x

So, 7x+1=43 degrees.

Double check by going, 9x-7=47+43=90

90+90=180

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