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quester [9]
3 years ago
8

Help me ASAP please!!!

Mathematics
2 answers:
Tom [10]3 years ago
5 0
7.

Hope this helps :)!
Arte-miy333 [17]3 years ago
4 0

Answer:

7

Step-by-step explanation:

The two angles + 90 degrees equals 180 degrees

So it is sufficient to say that the two angles equals 90 degrees

6r - 7 + 55 = 90

6r + 48 = 90

6r = 42

r = 7

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