A is the answer. 9=14 is the same as 14/9
c² = a² + b² - 2 a b cos C
2 a b cos C = a² + b² - c²
cos C = (a² + b² - c²) / 2ab
C = arccos( (a² + b² - c²) / 2ab )
C = arccos( (17² + 8² - 16²) / (2 (17)(8) ) )
C ≈ 69.11°
Answer: 69.1
Answer: 4 5 22 18 36 163 843 563
Step-by-step explanation:
Point D is (4,4)
and the idea is just simply substituting with D into (6x+5y) as follows:
6x+5y = 6*4 + 5*4 = 24 + 20 = 44
That is it
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