Question

Please help me i rlly need it

Answer 1

Answer:

im stuck on a similar problem right now

Answer 2

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)