From my knowledge, I know that cos(30) = ((2)^(1/2))/2, therefore 9cos(30) = 9((2)^(1/2))/2
Answer:
6n-2
is this what you needed??,
The number is near zero, so it is classified as "low." Its sign is negative, so it is a ...
-low negative correlation
Answer:
The solution to the equation will be:
![x=\sqrt[3]{2},\:x=-\sqrt[3]{2}](https://tex.z-dn.net/?f=x%3D%5Csqrt%5B3%5D%7B2%7D%2C%5C%3Ax%3D-%5Csqrt%5B3%5D%7B2%7D)
or
, 
Step-by-step explanation:
Given the expression

simplify

Divide both sides by 9


![\mathrm{For\:}x^n=f\left(a\right)\mathrm{,\:n\:is\:even,\:the\:solutions\:are\:}x=\sqrt[n]{f\left(a\right)},\:-\sqrt[n]{f\left(a\right)}](https://tex.z-dn.net/?f=%5Cmathrm%7BFor%5C%3A%7Dx%5En%3Df%5Cleft%28a%5Cright%29%5Cmathrm%7B%2C%5C%3An%5C%3Ais%5C%3Aeven%2C%5C%3Athe%5C%3Asolutions%5C%3Aare%5C%3A%7Dx%3D%5Csqrt%5Bn%5D%7Bf%5Cleft%28a%5Cright%29%7D%2C%5C%3A-%5Csqrt%5Bn%5D%7Bf%5Cleft%28a%5Cright%29%7D)
![x=\sqrt[6]{4},\:x=-\sqrt[6]{4}](https://tex.z-dn.net/?f=x%3D%5Csqrt%5B6%5D%7B4%7D%2C%5C%3Ax%3D-%5Csqrt%5B6%5D%7B4%7D)
solving
![x=\sqrt[6]{4}](https://tex.z-dn.net/?f=x%3D%5Csqrt%5B6%5D%7B4%7D)
![=\sqrt[6]{2^2}](https://tex.z-dn.net/?f=%3D%5Csqrt%5B6%5D%7B2%5E2%7D)
Apply exponent rule: 
![=\sqrt[6]{2^2}=2^{2\cdot \frac{1}{6}}](https://tex.z-dn.net/?f=%3D%5Csqrt%5B6%5D%7B2%5E2%7D%3D2%5E%7B2%5Ccdot%20%5Cfrac%7B1%7D%7B6%7D%7D)
![=\sqrt[3]{2}](https://tex.z-dn.net/?f=%3D%5Csqrt%5B3%5D%7B2%7D)

Thus,
(or
)
similarly solving
![x=-\sqrt[6]{4}](https://tex.z-dn.net/?f=x%3D-%5Csqrt%5B6%5D%7B4%7D)
or (
)
Therefore, the solution to the equation will be:
![x=\sqrt[3]{2},\:x=-\sqrt[3]{2}](https://tex.z-dn.net/?f=x%3D%5Csqrt%5B3%5D%7B2%7D%2C%5C%3Ax%3D-%5Csqrt%5B3%5D%7B2%7D)
or
, 
The answer is 315 as the formula is : a+b/2•h.