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:
7) C) 7
8) D) y=-2x+3
Step-by-step explanation:
7) 3x-1/9(27)=18
3x-3=18
3x=21
x=7
8) y=-2x+3
Answer:
$35.70
Step-by-step explanation:
5% would be 0.05 as a decimal.
multiply 34(0.05):
34(0.05)=1.7
This means that the sales tax would be $1.70.
Next, add $1.70+$34 to find the total cost
$1.70+$34=$35.70
This means that the total cost is $35.70
c
Please mark me as brainleist
In a 30 60 90 triangle, the "middle-sized" side = the short side multiplied by the square root of 3.
so the "middle-sized" side = x * square root of 3.
Source:
http://www.1728.org/trig2.htm
