B
Step-by-step explanation:
Given
- 7b = 21 ( divide both sides by - 7 )
b = - 3
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18. g
20. h 30 degree turn.
21. d 90 degree angles
and also 19 is a. a sphere not a cirlcle
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4 and 5)16.97 or 12√2
6)15.59 or 9√3
7)y = 15.59 or 9√3 x =27
8)17.80