Answer: -3
Step-by-step explanation:
2 + 3(x) = -7
-2 -2
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3x = -9
x = -3
Answer: flip the page there’s no question
Step-by-step explanation:
Answer: 
Step-by-step explanation:
By the exterior angle theorem,

I can try what exactly do you need help with
All circles are similar.
If they were congruent, they would have the same radius's/diameter's.
Circle B = diameter of 6
Circle A = radius of 4
Diameter = 2 * Radius
Circle A = diameter of 4 * 2 = 8
So they have different diameter's, therefore they are not congruent. So they are similar only.