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)
It’s= -0.6
(Hopefully it helped)
Sorry if this isn't clear
It's a ratio question.
Henry does 3 hrs for every one of Samuel's 2hrs, the ratio is 3:2
The total number of parts is 5 and to work out one part, divide 20 by 5
=4
So if Henry does 3hrs for Sam's 2hrs, he does 4 x 3 to get his part of the total 20hrs
4 x 3 = 12
And Sam does 2hrs, he does 4 x 2 = 8
So Henry does 12hrs a month
Answer:
Step-by-step explanation: