Answer:
fourth quadrant.............
Answer:
gasgas....
Step-by-step explanation:
Given:
Consider the below figure attached with this question.
To find:
The measure of angle r by using the cosine rule.
Solution:
According to Law of Cosine,
![a^2=b^2+c^2-2bc\cos A](https://tex.z-dn.net/?f=a%5E2%3Db%5E2%2Bc%5E2-2bc%5Ccos%20A)
Using the Law of Cosine, we get
![(7.2)^2=(3.7)^2+(5.2)^2-2(3.7)(5.2)\cos r](https://tex.z-dn.net/?f=%287.2%29%5E2%3D%283.7%29%5E2%2B%285.2%29%5E2-2%283.7%29%285.2%29%5Ccos%20r)
![51.84=13.69+27.04-38.48\cos r](https://tex.z-dn.net/?f=51.84%3D13.69%2B27.04-38.48%5Ccos%20r)
![51.84=40.73-38.48\cos r](https://tex.z-dn.net/?f=51.84%3D40.73-38.48%5Ccos%20r)
![51.84-40.73=-38.48\cos r](https://tex.z-dn.net/?f=51.84-40.73%3D-38.48%5Ccos%20r)
On further simplification, we get
![11.11=-38.48\cos r](https://tex.z-dn.net/?f=11.11%3D-38.48%5Ccos%20r)
![\dfrac{11.11}{-38.48}=\cos r](https://tex.z-dn.net/?f=%5Cdfrac%7B11.11%7D%7B-38.48%7D%3D%5Ccos%20r)
![-0.2887=\cos r](https://tex.z-dn.net/?f=-0.2887%3D%5Ccos%20r)
![\cos^{-1}(-0.2887)=r](https://tex.z-dn.net/?f=%5Ccos%5E%7B-1%7D%28-0.2887%29%3Dr)
![106.780143=r](https://tex.z-dn.net/?f=106.780143%3Dr)
![r\approx 106.78](https://tex.z-dn.net/?f=r%5Capprox%20106.78)
Therefore, the measure of angle r is 106.78 degrees.
Answer:
X = -6 - 3y
Y = -1
Step-by-step explanation: Solve for X first using basic algebra. Plug in X vaalue to original equation and solve. -6 - 3y + 3y = -6. Solve by adding 6 to both sides of the equation and dividing -3y by 3y.
Answer:
Gretchen be cause she has 2:14