Answer:
13.1
Step-by-step explanation:
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40(0.08) = 3.2
3.2+40
Answer: 43.20
x = 33
The sum of the 3 angles in a triangle = 180°
Subtract the sum of the 2 angles from 180 for x
x = 180 - (90 + 57) = 180 - 147 = 33
