Answer: B x=+-2
Step-by-step explanation:
The Quadratic formula is -b+-![-b+-\sqrt{(b^{2} -4ac)} /2a](https://tex.z-dn.net/?f=-b%2B-%5Csqrt%7B%28b%5E%7B2%7D%20-4ac%29%7D%20%2F2a)
First make everything equal to 0
![3x^2-18+6=0](https://tex.z-dn.net/?f=3x%5E2-18%2B6%3D0)
Then Simplify
![3x^2-12=0](https://tex.z-dn.net/?f=3x%5E2-12%3D0)
Now use the formula where a=3, b=0, and c=-12
divided by 2(3)
![0+-\sqrt{0-(-144)}/6](https://tex.z-dn.net/?f=0%2B-%5Csqrt%7B0-%28-144%29%7D%2F6)
![\frac{0+-12}{6}](https://tex.z-dn.net/?f=%5Cfrac%7B0%2B-12%7D%7B6%7D)
then we get 12/6 and -12/6 which simplified is +-2
Answer:
1 cm = 12 km. 4 cm = 48 km.
Step-by-step explanation:
12 x 4 = 48. I can't help with the first one. I am so sorry. I hope this one helps, though.
z-score fore -1.2 = 0.1151
z-score for 0.85 = 0.8023
Subtract :
0.8023 - 0.1151 =0.6872
The answer is C.
Answer:
-16 sqrt(3) +16i
Step-by-step explanation:
z = 2 cis (pi/6)
z^5 = 2^5 cis (5*pi/6)
z^5 = 32 cis (5pi/6)
z^5 = 32 cos (5pi/6) + 32 i sin (5pi/6)
= 32 * (-sqrt(3)/2) + 32i (1/2)
= -16 sqrt(3) +16i