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Ratling [72]
3 years ago
9

Please help me i rlly need it

Mathematics
2 answers:
Yakvenalex [24]3 years ago
5 0

Answer:

im stuck on a similar problem right now

iogann1982 [59]3 years ago
4 0

Answer:

8.2

Step-by-step explanation:

Use cosine law:

BC² = 7² + 9² - 2(7)(9)cos(60)

BC² = 67

BC = sqrt (67)

BC = 8.1853

BC = 8.2 (nearest tenth)

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