There are 5 couches and 4 love seats in the club house.
Answer: False. This expression is a monomial!
The simplest vector you can take along the x-axis is
![\mathbf v=langle1,0,0\rangle](https://tex.z-dn.net/?f=%5Cmathbf%20v%3Dlangle1%2C0%2C0%5Crangle)
.
Now,
![\mathbf b\cdot\mathbf v=\|\mathbf b\|\|\mathbf v\|\cos\theta](https://tex.z-dn.net/?f=%5Cmathbf%20b%5Ccdot%5Cmathbf%20v%3D%5C%7C%5Cmathbf%20b%5C%7C%5C%7C%5Cmathbf%20v%5C%7C%5Ccos%5Ctheta)
where
![\theta](https://tex.z-dn.net/?f=%5Ctheta)
is the angle between the two vectors. You have
![\mathbf b\cdot\mathbf v=\langle4.4,9.6,5\rangle\cdot\langle1,0,0\rangle=4.4](https://tex.z-dn.net/?f=%5Cmathbf%20b%5Ccdot%5Cmathbf%20v%3D%5Clangle4.4%2C9.6%2C5%5Crangle%5Ccdot%5Clangle1%2C0%2C0%5Crangle%3D4.4)
![\|\mathbf b\|=\sqrt{4.4^2+9.6^2+5^2}\approx11.68](https://tex.z-dn.net/?f=%5C%7C%5Cmathbf%20b%5C%7C%3D%5Csqrt%7B4.4%5E2%2B9.6%5E2%2B5%5E2%7D%5Capprox11.68)
![\|\mathbf v\|=\sqrt{1^2+0^2+0^2}=1](https://tex.z-dn.net/?f=%5C%7C%5Cmathbf%20v%5C%7C%3D%5Csqrt%7B1%5E2%2B0%5E2%2B0%5E2%7D%3D1)
so that
There are 180° in a triangle so you do
180- (30+30)
=180 - 60
=120
Therefore the answer is x = 120