Answer:
First line
Step-by-step explanation:
It's an X-intercept line so you're plugging in the number that the dot is on in place of the X in the formula
=12 + 16i + 21i + 28i^2
=12 + 37i + -28
=37i - 16
Answer:
Use the cosine rule
Step-by-step explanation:
1. Apply formula of c^2 = a^2 + b^2 - 2abcosC
2. Substitute known values in: c^2 = 36 + 4900 - 840cos120
3. Apply algebra and use the calculator
4. Final answer is 73.18 (2 decimal places)
Answer:
4
Step-by-step explanation: