Answer:
30°
Step-by-step explanation:
∠A + ∠B + ∠C = 180
∠B = ∠A + 20
∠C = 2 * ∠B
<A + (∠A + 20) + (2 * ∠B) = 180
<A + (∠A + 20) + (2 * (∠A + 20)) = 180
<A + (∠A + 20) + 2∠A + 40 = 180
4∠A + 60 = 180
4∠A = 120
∠A = 30
3.3 x 5 = 16.5 cm
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3/4 x 12 = 9
The answer is 9
- (2x + 2) - 1 = -x - (x + 3)
-2x - 2 - 1 = -x - x - 3
-2x - 3 = -2x - 3
This is an identity and x can be any value
Answer many solutions
